# List of RAF squadron codes

Most units of the Royal Air Force (RAF) are identified by a two character alphabetical or alpha- numeric combination squadron code. Usually, that code is painted on the aircraft belonging to that squadron. The squadron code is usually presented along with an individual letter or character to form a call sign for the particular aircraft. Location of the call sign combination has usually been on the rear fuselage next to the RAF roundel.
In instances when an unusually large numbers of aircraft comprise the squadron, multiple squadron codes have been used.
Other air forces, especially those from other Commonwealth countries, have often used similar systems of identification. During the Second World War, when units from other air forces were attached to the RAF; such as the Article XV squadrons (also known as '400 series squadrons'), their squadron codes were often changed, to avoid confusion with RAF units.

## Squadron codes
### A-E

RAF squadron codes :
| squadron code | unit | Notes |
| A | No. 1 Photographic Reconnaissance Unit RAF | 1 PRU |
| A | No. 111 Operational Training Unit RAF | 111 OTU |
| A | No. 112 Squadron RAF | Jul 1953 – Jan 1954 |
| A | No. 118 Squadron RAF | Apr 1951 - Mar 1955 |
| A | No. 120 Squadron RAF | 120 Sqn |
| A | No. 14 (Advanced) Flying Training School | 14 (A) FTS |
| A | No. 14 Squadron RAF | 14 Sqn |
| A | No. 19 Flying Training School RAF | 19 FTS |
| A | No. 201 Squadron RAF | 201 Sqn |
| A | No. 202 Squadron RAF | 202 Sqn |
| A | No. 217 Squadron RAF | 217 Sqn |
| A | No. 229 Operational Conversion Unit RAF | 229 OCU |
| A | No. 266 Squadron RAF | 266 Sqn |
| A | No. 3 Squadron RAF | 3 Sqn |
| A | No. 39 Squadron RAF | 38 Sqn |
| A | No. 4 Flying Training School RAF | 4 FTS |
| A | No. 42 Squadron RAF | 42 Sqn |
| A | No. 43 Squadron RAF | 43 Sqn |
| A | No. 5 Squadron RAF | 5 Sqn |
| A | No. 541 Squadron RAF | 541 Sqn |
| A | No. 56 Squadron RAF | 56 Sqn |
| A | No. 72 Squadron RAF | 72 Sqn |
| A | No. 9 Squadron RAF | 9 Sqn |
| A | No. 94 Squadron RAF | 94 Sqn |
| A | RAF College Flying Training School | RAF Coll FTS |
| A2 | No. 514 Squadron RAF | 514 Sqn |
| A3 | No. 1653 Conversion Unit RAF | 1653 CU |
| A3 | No. 230 Operational Conversion Unit RAF | 230 OCU |
| A4 | No. 115 Squadron RAF | 115 Sqn |
| A4 | No. 195 Squadron RAF | 195 Sqn |
| A5 | No. 3 Lancaster Finishing School RAF | 3 LFS |
| A6 | No. 257 Squadron RAF | 257 Sqn |
| A9 | Station Flight RAF Woodbridge | |
| AA | No. 134 Squadron RAF | 134 Sqn |
| AA | No. 75 (New Zealand) Squadron RAF | 75 (NZ) Sqn |
| AB | No. 1557 (Radio Aids Training) Flight RAF | 1557 (RAT) Flt |
| AB | No. 423 Squadron RCAF | 423 Sqn RCAF (sometimes 423 (RCAF) Sqn) |
| AC | No. 138 Squadron RAF | 138 Sqn |
| AD | No. 113 Squadron RAF | 113 Sqn |
| AD | No. 251 Squadron RAF | 251 Sqn |
| AD | No. 60 Squadron RAF | 60 Sqn |
| AE | No. 1409 (Meteorological) Flight RAF | 1409 (Met) Flt |
| AE | No. 402 Squadron RCAF | 402 Sqn RCAF (sometimes 402 (RCAF) Sqn) |
| AF | Air Fighting Development Establishment | AFDE |
| AF | Air Fighting Development Unit | AFDU |
| AF | No. 294 Squadron RAF | 294 Sqn |
| AF | No. 607 Squadron RAF | 607 Sqn |
| AG | No. 197 Squadron RAF | 197 Sqn |
| AH | No. 332 (Norway) Squadron RAF | 332 (Norwegian) Sqn |
| AI | No. 20 Operational Training Unit RAF | 20 OTU |
| AJ | No. 617 Squadron RAF | 1943-1946, |
| AJ | Station Flight RAF North Luffenham | |
| AK | No. 1657 Conversion Unit RAF | 1657 CU |
| AK | No. 213 Squadron RAF | 213 Sqn |
| AL | No. 429 Squadron RCAF | 429 Sqn RCAF, sometimes 429 (RCAF) Sqn |
| AL | No. 79 Squadron RAF | 79 Sqn |
| AM | No. 14 Operational Training Unit RAF | 14 OTU |
| AM | No. 219 Squadron RAF | 219 Sqn |
| AN | No. 13 Squadron RAF | 13 Sqn |
| AN | No. 417 Squadron RCAF | 417 Sqn RCAF (sometimes 417 (RCAF) Sqn) |
| AN | Station Flight RAF Great Dunmow | |
| AO | No. 211 Squadron RAF | 211 Sqn |
| AO | No. 267 Squadron RAF | 267 Sqn |
| AP | No. 130 Squadron RAF | 130 Sqn |
| AP | No. 186 Squadron RAF | 186 Sqn |
| AQ | No. 267 Squadron RAF | 267 Sqn |
| AR | No. 309 (Polish) Squadron RAF | 309 Polish Sqn |
| AR | No. 460 Squadron RAAF | 460 Sqn RAAF (sometimes 460 RAAF Sqn) |
| AS | No. 100 Squadron RAF | 100 Sqn |
| AS | No. 166 Squadron RAF | 166 Sqn |
| AS | No. 176 Squadron RAF | 176 Sqn |
| AS | No. 83 Squadron RAF | 83 Sqn |
| AS | No. 97 Squadron RAF | 97 Sqn |
| AT | No. 13 Operational Training Unit RAF | 13 OTU |
| AT | No. 299 Squadron RAF | 299 Sqn |
| AT | No. 60 Operational Training Unit RAF | 60 OTU |
| AU | No. 148 Squadron RAF | 148 Sqn |
| AU | No. 279 Squadron RAF | 279 Sqn |
| AU | No. 421 Squadron RCAF | 421 Sqn RCAF (sometimes 421 (RCAF) Sqn) |
| AV | No. 121 (Eagle) Squadron RAF | 121 (Eagle) Sqn |
| AW | No. 42 Squadron RAF | 42 Sqn |
| AW | No. 504 Squadron RAF | 504 Sqn |
| AW | No. 664 Squadron RAF | 664 Sqn |
| AX | No. 161 Squadron RAF | 161 Sqn |
| AX | 1 Squadron SAAF | 1 Sqn SAAF |
| AX | 11 Operational Training Unit SAAF | 11 OTU SAAF |
| AX | No. 202 Squadron RAF | 202 Sqn |
| AY | No. 110 Squadron RCAF | 110 Sqn RCAF (1939–40)* |
| AY | No. 17 Operational Training Unit RAF | 17 OTU |
| AZ | No. 234 Squadron RAF | 234 Sqn |
| AZ | No. 627 Squadron RAF | 627 Sqn |
| B | Air Training Squadron RAF | AT Sqn |
| B | Canberra Standardisation and Training Flight RAF | CST Flt |
| B | Helicopter Operational Conversion Flight RAF | HOCF |
| B | No. 11 Squadron RAF | 11 Sqn |
| B | No. 111 Squadron RAF | 111 Sqn |
| B | No. 14 Squadron RAF | 14 Sqn |
| B | No. 145 Squadron RAF | 145 Sqn |
| B | No. 17 Squadron RAF | 17 Sqn |
| B | No. 18 Squadron RAF | 18 Sqn |
| B | No. 19 Flying Training School RAF | 19 FTS |
| B | No. 2 Squadron RAF | 2 Sqn |
| B | No. 203 Squadron RAF | 203 Sqn |
| B | No. 206 Squadron RAF | 206 Sqn |
| B | No. 224 Squadron RAF | 224 Sqn |
| B | No. 230 Squadron RAF | 230 Sqn |
| B | No. 231 Operational Conversion Unit RAF | 231 OCU |
| B | No. 240 Operational Conversion Unit RAF | 240 OCU |
| B | No. 269 Squadron RAF | 269 Sqn |
| B | No. 29 Squadron RAF | 29 Sqn |
| B | No. 4 Flying Training School RAF | 4 FTS |
| B | No. 4 Squadron RAF | 4 Sqn |
| B | No. 5 (Pilots) Advanced Flying Unit RAF | 5 (P) AFU |
| B | No. 5 Squadron RAF | 5 Sqn |
| B | No. 56 Squadron RAF | 56 Sqn |
| B | No. 87 Squadron RAF | 87 Sqn |
| B | RAF College Flying Training School | RAF Coll FTS |
| B | Tri-National Tornado Training Establishment | TTTE |
| B | Wessex Training Flight RAF | WT Flt |
| B3 | Station Flight RAF Wyton | |
| B4 | No. 282 Squadron RAF | 282 Sqn |
| B6 | Station Flight RAF Spilsby | |
| B7 | Station Flight RAF Waddington | |
| B8 | Station Flight RAF Woodhall Spa | |
| B9 | No. 1562 Flight RAF | 1562 Flt |
| BA | No. 277 Squadron RAF | 277 Sqn |
| BA | No. 125 Squadron RCAF | 125 Sqn RCAF* |
| BB | No. 226 Operational Conversion Unit RAF | 226 OCU |
| BB | No. 27 Operational Training Unit RAF | 27 OTU |
| BB | No. 347 (French) Squadron RAF | 347 French Sqn |
| BC | No. 511 Squadron RAF | 511 Sqn |
| BC | Photographic Reconnaissance Development Unit RAF | PRDU |
| BD | Air Observation Post School RAF | AOPS |
| BD | Light Aeroplane School RAF | LAS |
| BD | No. 227 Operational Conversion Unit RAF | 227 OCU |
| BD | No. 43 Operational Training Unit RAF | 43 OTU |
| BE | No. 284 Squadron RAF | 284 Sqn |
| BE | No. 8 Operational Training Unit RAF | 8 OTU |
| BF | No. 14 Squadron RCAF | 14 Sqn RCAF* |
| BF | No. 28 Squadron RAF | 28 Sqn |
| BF | No. 54 Operational Training Unit RAF | 54 OTU |
| BG | No. 606 Squadron RAF | 606 Sqn |
| BG | No. 660 Squadron RAF | 660 Sqn |
| BH | No. 215 Squadron RAF | 215 Sqn |
| BH | No. 228 Squadron RAF | 228 Sqn |
| BH | No. 300 Polish Bomber Squadron | 300 Polish Sqn |
| BI | Station Flight RAF Holme-on-Spalding Moor | |
| BJ | No. 271 Squadron RAF | 271 Sqn |
| BJ | No. 334 (Norway) Squadron RAF | 334 Norwegian Sqn |
| BK | No. 115 Squadron RAF | 115 Sqn |
| BK | Southern Sector Communication Flight RAF | SS Comm Flt |
| BL | No. 1656 Conversion Unit RAF | 1656 CU |
| BL | No. 40 Squadron RAF | 40 Sqn |
| BL | No. 609 Squadron RAF | 609 Sqn |
| BM | No. 308 Polish Fighter Squadron | 308 Polish Sqn |
| BM | No. 433 Squadron RCAF | 433 Sqn RCAF (sometimes 433 (RCAF) Sqn) |
| BN | No. 1401 Flight RAF | 1401 Flt |
| BN | No. 170 Squadron RAF | 170 Sqn |
| BN | No. 240 Squadron RAF | 240 Sqn |
| BN | No. 618 Squadron RAF | 618 Sqn |
| BO | No. 630 Squadron RAF | 630 Sqn |
| BP | No. 457 Squadron RAAF (June 1941 – March 1942) | 457 Sqn RAAF (sometimes 457 RAAF Sqn) |
| BP | No. 519 Squadron RAF | 519 Sqn |
| BQ | No. 451 Squadron RAAF | 451 Sqn RAAF (sometimes 451 RAAF Sqn) |
| BQ | No. 509 Squadron RAF | 509 Sqn (not formed) |
| BQ | No. 550 Squadron RAF | 550 Sqn |
| BQ | No. 600 Squadron RAF | 600 Sqn |
| BR | No. 184 Squadron RAF | 184 Sqn |
| BS | No. 120 Squadron RAF | 120 Sqn |
| BS | No. 148 Squadron RAF | 148 Sqn |
| BS | No. 160 Squadron RAF | 160 Sqn |
| BS | No. 1651 Conversion Unit RAF | 1651 CU |
| BT | No. 113 Squadron RAF | 113 Sqn |
| BT | No. 252 Squadron RAF | 252 Sqn |
| BT | No. 30 Operational Training Unit RAF | 30 OTU |
| BTU | Bombing Trials Unit RAF | BTU |
| BU | No. 214 Squadron RAF | 214 Sqn |
| BU | No. 227 Squadron RAF | 227 Sqn |
| BV | No. 305 (Polish) Squadron RAF | 305 Polish Sqn |
| BW | No. 58 Squadron RAF | 58 Sqn |
| BX | No. 86 Squadron RAF | 86 Sqn |
| BY | No. 23 Operational Training Unit RAF | 23 OTU |
| BY | No. 255 Squadron RAF | 255 Sqn |
| BY | No. 58 Squadron RAF | 58 Sqn |
| BY | No. 59 Squadron RAF | 59 Sqn |
| BZ | No. 107 Squadron RAF | 107 Sqn |
| BZ | No. 82 Operational Training Unit RAF | 82 OTU |
| C | Air Training Squadron RAF | AT Sqn |
| C | No. 100 Squadron RAF | 100 Sqn |
| C | No. 111 Operational Training Unit RAF | 111 OTU |
| C | No. 1563 Flight RAF | 1563 Flt |
| C | No. 17 Squadron RAF | 17 Sqn |
| C | No. 19 Flying Training School RAF | 19 FTS |
| C | No. 2 Tactical Air Force Communication Squadron RAF, No. 3 Group Communication Flight RAF | 2 TAF, 3 Gp Comm Flt |
| C | No. 20 Squadron RAF | 20 Sqn |
| C | No. 208 Squadron RAF | 208 Sqn |
| C | No. 216 Squadron RAF | 216 Sqn |
| C | No. 228 Operational Conversion Unit RAF | 228 OCU |
| C | No. 236 Operational Conversion Unit RAF | 236 OCU |
| C | No. 237 Operational Conversion Unit RAF | 237 OCU |
| C | No. 240 Operational Conversion Unit RAF | 240 OCU |
| C | No. 33 Squadron RAF | 33 Sqn |
| C | No. 4 Squadron RAF | 4 Sqn |
| C | No. 5 Squadron RAF | 5 Sqn |
| C | RAF College Flying Training School | RAF Coll FTS |
| C2 | Bomber Command Instructors School RAF | BCIS |
| C5 | Station Flight RAF Tibenham | |
| C6 | No. 51 Squadron RAF | 51 Sqn |
| C8 | No. 640 Squadron RAF | 640 Sqn |
| CA | No. 189 Squadron RAF | 189 Sqn |
| CA | 3 Squadron SAAF | 3 Sqn SAAF |
| CB | Metropolitan Communication Squadron RAF | Met Comm Sqn |
| CB | No. 31 Squadron RAF | 31 Sqn |
| CC | Station Flight RAF Holmsley South | |
| CE | No. 5 Lancaster Finishing School RAF | 5 LFS |
| CF | No. 625 Squadron RAF | 625 Sqn |
| CG | Station Flight RAF Binbrook | |
| CH | Station Flight RAF Swinderby | |
| CJ | No. 203 Squadron RAF | 203 Sqn |
| CL | Station Flight RAF Little Staughton | |
| CM | No. 107 Operational Training Unit RAF | 107 OTU |
| CM | No. 1333 Conversion Unit RAF | 1333 CU |
| CM | No. 42 Group Communication Flight RAF | 42 Gp Comm Flt |
| CO | No. 84 Operational Training Unit RAF | 84 OTU |
| CP | Station Flight RAF Topcliffe | |
| CR | No. 162 Squadron RAF | 162 Sqn |
| CS | No. 513 Squadron RAF | 513 Sqn |
| CS | Station Flight RAF Upwood | |
| CV | Station Flight RAF Tuddenham | |
| CV | No. 3 Squadron RAAF (1941–45) | 3 Sqn RAAF (although often referred to as 3 RAAF Sqn) |
| CX | No. 14 Squadron RAF | 14 Sqn |
| CY | Station Flight RAF Ludford Magna | |
| CZ | No. 222 Squadron RAF | 222 Sqn |
| CZ | No. 84 Operational Training Unit RAF | 84 OTU |
| D | Lightning Training Flight RAF | LTF |
| D | No. 11 Squadron RAF | 11 Sqn |
| D | No. 14 (Advanced) Flying Training School | 14 (A)FTS |
| D | No. 15 Squadron RAF | 15 Sqn |
| D | No. 19 Flying Training School RAF | 19 FTS |
| D | No. 230 Squadron RAF | 230 Sqn |
| D | No. 234 Squadron RAF | 234 Sqn |
| D | No. 235 Operational Conversion Unit RAF | 235 OCU |
| D | No. 31 Squadron RAF | 31 Sqn |
| D | No. 4 Flying Training School RAF | 4 FTS |
| D | No. 7 Flying Training School RAF | 7 FTS |
| D | RAF College Flying Training School | RAF Coll FTS |
| D2 | No. 1606 Flight RAF | 1606 Flt |
| D4 | No. 620 Squadron RAF | 620 Sqn |
| D6 | Station Flight RAF Hethel | |
| D8 | No. 22 Maintenance Unit RAF | 22 MU |
| D8 | No. 5 Ferry Pool RAF | 5 FP |
| DA | No. 210 Squadron RAF | 210 Sqn |
| DA | No. 273 Maintenance Unit RAF | 273 MU |
| DB | 2 Squadron SAAF | 2 Sqn SAAF |
| DB | No. 229 Squadron RAF | 229 Sqn |
| DB | No. 411 Squadron RCAF | 411 Sqn RCAF (sometimes 411 (RCAF) Sqn) |
| DC | Station Flight RAF Oakington | |
| DD | No. 15 Squadron RAAF | 15 Sqn RAAF* |
| DD | No. 22 Operational Training Unit RAF | 22 OTU |
| DD | No. 45 Squadron RAF | 45 Sqn |
| DE | No. 61 Operational Training Unit RAF | 61 OTU |
| DE | No. 86 Squadron RAF | 86 Sqn |
| DF | Central Bomber Establishment RAF | CBE |
| DF | No. 221 Squadron RAF | 221 Sqn |
| DG | No. 150 Squadron RAF | 150 Sqn |
| DG | No. 155 Squadron RAF | 155 Sqn |
| DG | No. 422 Squadron RCAF | 422 Sqn RCAF (sometimes 422 (RCAF) Sqn) |
| DH | No. 1664 Conversion Unit RAF | 1664 CU |
| DH | No. 540 Squadron RAF | 540 Sqn |
| DI | Station Flight RAF Kemble | |
| DJ | No. 15 Squadron RAF | 15 Sqn |
| DJ | No. 612 Squadron RAF | 12 Sqn |
| DK | No. 32 Operational Training Unit RAF | 32 OTU |
| DL | No. 421 (Reconnaissance) Flight RAF | 421 Flt |
| DL | No. 54 Squadron RAF (1943–45) | 54 (RAF) Sqn – in SW Pacific, attached to RAAF. Or 54 Sqn RAF. |
| DL | No. 91 Squadron RAF | 91 Sqn |
| DL | No. 92 Squadron RAF | 92 Sqn |
| DM | No. 248 Squadron RAF | 248 Sqn |
| DN | No. 416 Squadron RCAF | 416 Sqn RCAF (sometimes 416 (RCAF) Sqn) |
| DO | No. 199 Squadron RAF | 199 Sqn |
| DP | No. 1416 Flight RAF | 1416 Flt |
| DP | No. 193 Squadron RAF | 193 Sqn |
| DP | No. 30 Squadron RAF | 30 Sqn |
| DS | Station Flight RAF Llanbedr | |
| DT | No. 192 Squadron RAF | 192 Sqn |
| DT | No. 257 Squadron RAF | 257 Sqn |
| DU | No. 312 (Czech) Squadron RAF | 312 Czech Sqn |
| DU | No. 70 Squadron RAF | 80 Sqn |
| DV | No. 129 Squadron RAF | 129 Sqn |
| DW | No. 610 Squadron RAF | 610 Sqn |
| DX | No. 230 Squadron RAF | 230 Sqn |
| DX | No. 245 Squadron RAF | 245 Sqn |
| DX | No. 57 Squadron RAF | 57 Sqn |
| DX | 4 Squadron SAAF | 4 Sqn SAAF |
| DY | No. 102 Squadron RAF | 102 Sqn |
| DY | No. 112 Squadron RAF | 112 Sqn |
| DY | No. 508 Squadron RAF | 508 Sqn (not formed) |
| DZ | No. 151 Squadron RAF | 151 Sqn |
| E | No. 15 Squadron RAF | 15 Sqn |
| E | No. 18 Squadron RAF | 18 Sqn |
| E | No. 19 Flying Training School RAF | 19 FTS |
| E | No. 23 Squadron RAF | 23 Sqn |
| E | No. 360 Squadron RAF | 360 Sqn |
| E | No. 5 (Pilots) Advanced Flying Unit | 5 (P)AFU |
| E | No. 6 Squadron RAF | 6 Sqn |
| E | No. 7 Squadron RAF | 8 Sqn |
| E | No. 72 Squadron RAF | 82 Sqn |
| E | RAF College Flying Training School | RAF Coll FTS |
| E2 | Station Flight RAF Warboys | |
| E4 | Station Flight RAF Wickenby | |
| E7 | No. 570 Squadron RAF | 570 Sqn |
| E9 | Station Flight RAF Westcott | |
| EA | Central Fighter Establishment | CFE |
| EA | No. 325 Squadron RAF | 325 Sqn (not formed) |
| EA | No. 49 Squadron RAF | 49 Sqn |
| EB | No. 41 Squadron RAF | 41 Sqn |
| EC | Station Flight RAF Odiham | |
| ED | No. 21 Operational Training Unit RAF | 21 OTU |
| EE | No. 16 Squadron RAF | 16 Sqn |
| EE | No. 404 Squadron RCAF | 404 Sqn RCAF (sometimes 404 (RCAF) Sqn) |
| EE | Station Flight RAF Elvington | |
| EF | No. 102 Squadron RAF | 102 Sqn |
| EF | No. 15 Squadron RAF | 15 Sqn |
| EF | No. 232 Squadron RAF | 232 Sqn |
| EF | No. 36 Operational Training Unit RAF | 36 OTU |
| EG | No. 16 Squadron RAF | 16 Sqn |
| EG | No. 268 Squadron RAF | 268 Sqn |
| EG | No. 34 Squadron RAF | 34 Sqn |
| EG | No. 487 Squadron RNZAF | 487 (RNZAF) Sqn (sometimes 487 Sqn RNZAF) |
| EH | No. 109 Squadron RAF | 109 Sqn |
| EH | No. 3 Tactical Exercise Unit RAF | 3 TEU |
| EH | No. 55 Operational Training Unit RAF | 55 OTU |
| EJ | Coastal Command Flying Instructors School RAF | CCFIS |
| EJ | Coastal Command Instructors School RAF | CCIS |
| EJ | No. 127 Squadron RAF | 127 Sqn |
| EK | No. 1656 Conversion Unit RAF | 1656 CU |
| EK | No. 168 Squadron RAF | 168 Sqn |
| EL | No. 10 Operational Training Unit RAF | 10 OTU |
| EL | No. 181 Squadron RAF | 181 Sqn |
| EL | No. 71 Squadron RAF | 81 Sqn |
| EM | No. 207 Squadron RAF | 207 Sqn |
| EN | No. 27 Operational Training Unit RAF | 27 OTU |
| EO | No. 15 Operational Training Unit RAF | 15 OTU |
| EO | No. 404 Squadron RCAF | 404 Sqn RCAF (sometimes 404 (RCAF) Sqn) |
| EP | No. 104 Squadron RAF | 104 Sqn |
| EP | No. 84 Group Communication Flight RAF | 57 Gp Comm Flt |
| EQ | No. 408 Squadron RCAF | 408 Sqn RCAF (sometimes 408 (RCAF) Sqn) |
| EQ | No. 57 Squadron RAF | 57 Sqn |
| ER | No. 1552 Flight RAF | 1552 Flt |
| ER | No. 621 Squadron RAF | 621 Sqn |
| ES | No. 229 Operational Conversion Unit RAF | 229 OCU |
| ES | No. 541 Squadron RAF | 541 Sqn |
| ES | No. 628 Squadron RAF | 628 Sqn |
| EU | No. 26 Operational Training Unit RAF | 26 OTU |
| EU | No. 641 Squadron RAF | 641 Sqn (not formed) |
| EV | No. 180 Squadron RAF | 180 Sqn |
| EV | No. 191 Squadron RAF | 191 Sqn |
| EW | No. 307 Polish Night Fighter Squadron | 307 Polish Sqn |
| EW | No. 47 Squadron RAF | 47 Sqn |
| EX | No. 11 Squadron RAF | 11 Sqn |
| EX | No. 117 Squadron RAF | 117 Sqn |
| EX | No. 199 Squadron RAF | 199 Sqn |
| EX | No. 6 Squadron RAF | 6 Sqn |
| EY | No. 233 Squadron RAF | 233 Sqn |
| EY | No. 78 Squadron RAF | 88 Sqn |
| EY | No. 80 Squadron RAF | 80 Sqn |
| EZ | No. 1380 Conversion Unit RAF | 1380 CU |
| EZ | No. 241 Squadron RAF | 241 Sqn |
| EZ | No. 81 Operational Training Unit RAF | 81 OTU |

### F- J

| Squadron code | Unit | Unit shorthand |
| F | Air / Sea Warfare Development Unit RAF | A/SWDU |
| F | No. 111 Operational Training Unit RAF | 111 OTU |
| F | No. 12 Squadron RAF | 12 Sqn |
| F | No. 16 Squadron RAF | 16 Sqn |
| F | No. 19 Flying Training School RAF | 19 FTS |
| F | No. 240 Operational Conversion Unit RAF | 240 OCU |
| F | No. 25 Squadron RAF | 25 Sqn |
| F | No. 4 Flying Training School RAF | 4 FTS |
| F | No. 6 Flying Training School RAF | 6 FTS |
| F1 | 'P' Flight No. 1 Anti-Aircraft Co-operation Unit RAF | 'P' Flt 1 AACU |
| F2 | No. 635 Squadron RAF | 635 Sqn |
| F3 | No. 438 Squadron RCAF | 438 Sqn RCAF (sometimes 438 (RCAF) Sqn) |
| FA | No. 236 Squadron RAF | 236 Sqn |
| FA | No. 281 Squadron RAF | 281 Sqn |
| FAA | No. 19 Flying Training School RAF | 19 FTS |
| FAA | RAF College Flying Training School | RAF Coll FTS |
| FAB | No. 19 Flying Training School RAF | 19 FTS |
| FAB | RAF College Flying Training School | RAF Coll FTS |
| FAC | No. 19 Flying Training School RAF | 19 FTS |
| FAC | RAF College Flying Training School | RAF Coll FTS |
| FAD | No. 19 Flying Training School RAF | 19 FTS |
| FAD | RAF College Flying Training School | RAF Coll FTS |
| FAE | No. 19 Flying Training School RAF | 19 FTS |
| FAE | RAF College Flying Training School | RAF Coll FTS |
| FAF | No. 19 Flying Training School RAF | 19 FTS |
| FAF | RAF College Flying Training School | RAF Coll FTS |
| FAG | No. 19 Flying Training School RAF | 19 FTS |
| FAG | RAF College Flying Training School | RAF Coll FTS |
| FAI | No. 2 Flying Training School RAF | 2 FTS |
| FAI | No. 20 Flying Training School RAF | 20 FTS |
| FAI | No. 20 Service Flying Training School | 20 SFTS |
| FAJ | No. 2 Flying Training School RAF | 2 FTS |
| FAJ | No. 20 Flying Training School RAF | 20 FTS |
| FAJ | No. 20 Service Flying Training School | 20 SFTS |
| FAK | No. 2 Flying Training School RAF | 2 FTS |
| FAK | No. 20 Flying Training School RAF | 20 FTS |
| FAK | No. 20 Service Flying Training School | 20 SFTS |
| FAL | No. 2 Flying Training School RAF | 2 FTS |
| FAL | No. 20 Flying Training School RAF | 20 FTS |
| FAL | No. 20 Service Flying Training School | 20 SFTS |
| FAM | No. 2 Flying Training School RAF | 2 FTS |
| FAM | No. 20 Flying Training School RAF | 20 FTS |
| FAM | No. 20 Service Flying Training School | 20 SFTS |
| FAN | No. 21 Flying Training School RAF | 21 FTS |
| FAO | No. 21 Flying Training School RAF | 21 FTS |
| FAP | No. 21 Flying Training School RAF | 21 FTS |
| FAQ | No. 21 Flying Training School RAF | 21 FTS |
| FAS | No. 16 (Polish) Flying Training School | 16 (Pol.) FTS |
| FAT | No. 16 (Polish) Flying Training School | 16 (Pol.) FTS |
| FAU | No. 16 (Polish) Flying Training School | 16 (Pol.) FTS |
| FAV | No. 16 (Polish) Flying Training School | 16 (Pol.) FTS |
| FAW | No. 16 (Polish) Flying Training School | 16 (Pol.) FTS |
| FAX | No. 16 (Polish) Flying Training School | 16 (Pol.) FTS |
| FAY | No. 16 (Polish) Flying Training School | 16 (Pol.) FTS |
| FB | No. 24 Operational Training Unit RAF | 24 OTU |
| FB | No. 35 Squadron RAF | 35 Sqn |
| FB | Washington Conversion Unit RAF | WCU |
| FBA | No. 7 Flying Training School RAF | 7 FTS |
| FBA | No. 7 Service Flying Training School | 7 SFTS |
| FBB | No. 7 Flying Training School RAF | 7 FTS |
| FBB | No. 7 Service Flying Training School | 7 SFTS |
| FBC | No. 7 Flying Training School RAF | 7 FTS |
| FBC | No. 7 Service Flying Training School | 7 SFTS |
| FBD | No. 7 Flying Training School RAF | 7 FTS |
| FBD | No. 7 Service Flying Training School | 7 SFTS |
| FBE | No. 7 Flying Training School RAF | 7 FTS |
| FBE | No. 7 Service Flying Training School | 7 SFTS |
| FBG | No. 6 Flying Training School RAF | 6 FTS |
| FBG | No. 6 Service Flying Training School | 6 SFTS |
| FBH | No. 6 Flying Training School RAF | 6 FTS |
| FBH | No. 6 Service Flying Training School | 6 SFTS |
| FBI | No. 6 Flying Training School RAF | 6 FTS |
| FBI | No. 6 Service Flying Training School | 6 SFTS |
| FBJ | No. 6 Flying Training School RAF | 6 FTS |
| FBJ | No. 6 Service Flying Training School | 6 SFTS |
| FBK | No. 6 Flying Training School RAF | 6 FTS |
| FBK | No. 6 Service Flying Training School | 6 SFTS |
| FBL | No. 6 Flying Training School RAF | 6 FTS |
| FBL | No. 6 Service Flying Training School | 6 SFTS |
| FBM | No. 6 Flying Training School RAF | 6 FTS |
| FBM | No. 6 Service Flying Training School | 6 SFTS |
| FBN | No. 6 Flying Training School RAF | 6 FTS |
| FBN | No. 6 Service Flying Training School | 6 SFTS |
| FBP | No. 3 Flying Training School RAF | 3 FTS |
| FBP | No. 3 Service Flying Training School | 3 SFTS |
| FBQ | No. 3 Flying Training School RAF | 3 FTS |
| FBQ | No. 3 Service Flying Training School | 3 SFTS |
| FBR | No. 3 Flying Training School RAF | 3 FTS |
| FBR | No. 3 Service Flying Training School | 3 SFTS |
| FBS | No. 3 Flying Training School RAF | 3 FTS |
| FBS | No. 3 Service Flying Training School | 3 SFTS |
| FBT | No. 3 Flying Training School RAF | 3 FTS |
| FBT | No. 3 Service Flying Training School | 3 SFTS |
| FBU | No. 3 Flying Training School RAF | 3 FTS |
| FBU | No. 3 Service Flying Training School | 3 SFTS |
| FBV | No. 3 Flying Training School RAF | 3 FTS |
| FBV | No. 3 Service Flying Training School | 3 SFTS |
| FBW | No. 3 Flying Training School RAF | 3 FTS |
| FBW | No. 3 Service Flying Training School | 3 SFTS |
| FBX | No. 3 Flying Training School RAF | 3 FTS |
| FBX | No. 3 Service Flying Training School | 3 SFTS |
| FC | Station Flight RAF Kenley | |
| FCA | No. 1 Flying Training School RAF | 1 FTS |
| FCA | No. 17 Flying Training School RAF | 17 FTS |
| FCA | No. 17 Service Flying Training School | 17 SFTS |
| FCB | No. 1 Flying Training School RAF | 1 FTS |
| FCB | No. 17 Flying Training School RAF | 17 FTS |
| FCB | No. 17 Service Flying Training School | 17 SFTS |
| FCC | No. 1 Flying Training School RAF | 1 FTS |
| FCC | No. 17 Flying Training School RAF | 17 FTS |
| FCC | No. 17 Service Flying Training School | 17 SFTS |
| FCD | No. 1 Flying Training School RAF | 1 FTS |
| FCD | No. 17 Flying Training School RAF | 17 FTS |
| FCD | No. 17 Service Flying Training School | 17 SFTS |
| FCE | No. 1 Flying Training School RAF | 1 FTS |
| FCE | No. 17 Flying Training School RAF | 17 FTS |
| FCE | No. 17 Service Flying Training School | 17 SFTS |
| FCF | No. 1 Flying Training School RAF | 1 FTS |
| FCF | No. 17 Flying Training School RAF | 17 FTS |
| FCF | No. 17 Service Flying Training School | 17 SFTS |
| FCG | No. 1 Flying Training School RAF | 1 FTS |
| FCG | No. 17 Flying Training School RAF | 17 FTS |
| FCG | No. 17 Service Flying Training School | 17 SFTS |
| FCI | No. 22 Flying Training School RAF | 22 FTS |
| FCI | No. 22 Service Flying Training School | 20 SFTS |
| FCJ | No. 22 Flying Training School RAF | 22 FTS |
| FCJ | No. 22 Service Flying Training School | 22 SFTS |
| FCK | No. 22 Flying Training School RAF | 22 FTS |
| FCK | No. 22 Service Flying Training School | 22 SFTS |
| FCL | No. 22 Flying Training School RAF | 22 FTS |
| FCL | No. 22 Service Flying Training School | 22 SFTS |
| FCM | No. 22 Flying Training School RAF | 22 FTS |
| FCM | No. 22 Service Flying Training School | 22 SFTS |
| FCT | Empire Central Flying School | ECFS |
| FCT | Empire Flying School | EFS |
| FCT | RAF Flying College | RAF Fng Coll |
| FCU | Empire Central Flying School | ECFS |
| FCU | Empire Flying School | EFS |
| FCU | RAF Flying College | RAF Fng Coll |
| FCV | Empire Central Flying School | ECFS |
| FCV | Empire Flying School | EFS |
| FCV | RAF Flying College | RAF Fng Coll |
| FCW | Empire Central Flying School | ECFS |
| FCW | Empire Flying School | EFS |
| FCW | RAF Flying College | RAF Fng Coll |
| FCX | Empire Central Flying School | ECFS |
| FCX | Empire Flying School | EFS |
| FCX | RAF Flying College | RAF Fng Coll |
| FD | No. 114 Squadron RAF | 114 Sqn |
| FD | No. 1659 Conversion Unit RAF | 1659 CU |
| FDA | No. 1 (Pilot Refresher) Flying Unit | 1 (PR) FU |
| FDA | No. 21 (Pilot Refresher) Flying School | 21 (PR) FS |
| FDA | No. 21 (Pilots) Advanced Flying Unit | 21 (P) AFU |
| FDB | No. 1 Flying Training School RAF | 1 (PR) FU |
| FDB | No. 21 (Pilot Refresher) Flying School | 21 (PR) FS |
| FDB | No. 21 (Pilots) Advanced Flying Unit | 21 (P) AFU |
| FDC | No. 1 (Pilot Refresher) Flying Unit RAF | 1 (PR) FU |
| FDC | No. 21 (Pilot Refresher) Flying School RAF | 21 (PR) FS |
| FDC | No. 21 (Pilots) Advanced Flying Unit | 21 (P) AFU |
| FDD | No. 1 (Pilot Refresher) Flying Unit RAF | 1 (PR) FU |
| FDD | No. 21 (Pilot Refresher) Flying School | 21 (PR) FS |
| FDD | No. 21 (Pilots) Advanced Flying Unit | 21 (P) AFU |
| FDE | No. 1 (Pilot Refresher) Flying Unit RAF | 1 (PR) FU |
| FDE | No. 21 (Pilot Refresher) Flying School | 21 (PR) FS |
| FDE | No. 21 (Pilots) Advanced Flying Unit | 21 (P) AFU |
| FDF | No. 1 (Pilot Refresher) Flying Unit RAF | 1 (PR) FU |
| FDF | No. 21 (Pilot Refresher) Flying School | 21 (PR) FS |
| FDF | No. 21 (Pilots) Advanced Flying Unit | 21 (P) AFU |
| FDG | No. 1 (Pilot Refresher) Flying Unit RAF | 1 (PR) FU |
| FDG | No. 21 (Pilot Refresher) Flying School | 21 (PR) FS |
| FDG | No. 21 (Pilots) Advanced Flying Unit | 21 (P) AFU |
| FDI | Central Flying School | CFS |
| FDJ | Central Flying School | CFS |
| FDK | Central Flying School | CFS |
| FDL | Central Flying School | CFS |
| FDM | Central Flying School | CFS |
| FDN | Central Flying School | CFS |
| FDO | Central Flying School | CFS |
| FDQ | No. 10 Flying Instructors School RAF | 10 FIS |
| FDQ | No. 8 Elementary Flying Training School | 8 EFTS |
| FDR | No. 10 Flying Instructors School RAF | 10 FIS |
| FDR | No. 8 Elementary Flying Training School | 8 EFTS |
| FDS | No. 10 Flying Instructors School RAF | 10 FIS |
| FDS | No. 8 Elementary Flying Training School | 8 EFTS |
| FDT | No. 10 Flying Instructors School RAF | 10 FIS |
| FDT | No. 8 Elementary Flying Training School | 8 EFTS |
| FDU | Beam Approach School RAF | B App S |
| FDV | Beam Approach School RAF | B App S |
| FDW | Beam Approach School RAF | B App S |
| FDW | Central Flying School | CFS |
| FDX | Beam Approach School RAF | B App S |
| FDY | Airfield Controllers School RAF | ACS |
| FDY | School of Air Traffic Control RAF | S OF ATC |
| FDY | School of Flying Control RAF | S OF FC |
| FE | No. 56 Operational Training Unit RAF | 56 OTU |
| FE | No. 644 Squadron RAF | 644 Sqn |
| FEA | No. 1 Glider Training School RAF | 1 GTS |
| FED | No. 1 Glider Training School RAF | 1 GTS |
| FED | No. 1 Glider Training School RAF | 1 GTS |
| FEE | No. 1 Glider Training School RAF | 1 GTS |
| FEG | No. 3 Glider Training School RAF | 3 GTS |
| FEH | No. 3 Glider Training School RAF | 3 GTS |
| FEI | No. 3 Glider Training School RAF | 3 GTS |
| FEJ | No. 3 Glider Training School RAF | 3 GTS |
| FEK | No. 3 Glider Training School RAF | 3 GTS |
| FEL | No. 3 Glider Training School RAF | 3 GTS |
| FEM | No. 3 Glider Training School RAF | 3 GTS |
| FEN | No. 3 Glider Training School RAF | 3 GTS |
| FEP | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FEQ | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FER | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FES | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FET | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FF | No. 132 Squadron RAF | 132 Sqn |
| FF | No. 251 Squadron RAF | 251 Sqn |
| FFA | No. 10 Air Gunnery School RAF | 10 AGS |
| FFB | No. 10 Air Gunnery School RAF | 10 AGS |
| FFC | No. 10 Air Gunnery School RAF | 10 AGS |
| FFD | No. 10 Air Gunnery School RAF | 10 AGS |
| FFE | No. 11 Air Gunnery School RAF | 11 AGS |
| FFF | No. 11 Air Gunnery School RAF | 11 AGS |
| FFG | No. 11 Air Gunnery School RAF | 11 AGS |
| FFI | No. 1 Air Navigation School RAF | 1 ANS |
| FFI | No. 5 Air Navigation School RAF | 5 ANS |
| FFJ | No. 1 Air Navigation School RAF | 1 ANS |
| FFJ | No. 5 Air Navigation School RAF | 5 ANS |
| FFK | No. 1 Air Navigation School RAF | 1 ANS |
| FFK | No. 5 Air Navigation School RAF | 5 ANS |
| FFM | No. 2 Air Navigation School RAF | 1 ANS |
| FFM | No. 7 Air Navigation School RAF | 5 ANS |
| FFN | No. 2 Air Navigation School RAF | 2 ANS |
| FFN | No. 7 Air Navigation School RAF | 7 ANS |
| FFO | No. 2 Air Navigation School RAF | 2 ANS |
| FFO | No. 7 Air Navigation School RAF | 7 ANS |
| FFP | No. 2 Air Navigation School RAF | 2 ANS |
| FFP | No. 7 Air Navigation School RAF | 7 ANS |
| FFR | No. 10 Air Navigation School RAF | 10 ANS |
| FFS | No. 10 Air Navigation School RAF | 10 ANS |
| FFT | No. 10 Air Navigation School RAF | 10 ANS |
| FFU | No. 10 Air Navigation School RAF | 10 ANS |
| FG | No. 335 (Greek) Squadron RAF | 335 Greek Sqn |
| FG | No. 72 Squadron RAF | 82 Sqn |
| FGA | Empire Air Armament School RAF | EAAS |
| FGA | RAF Flying College | RAF Fng Coll |
| FGB | Empire Air Armament School RAF | EAAS |
| FGB | RAF Flying College | RAF Fng Coll |
| FGC | Empire Air Armament School RAF | EAAS |
| FGC | RAF Flying College | RAF Fng Coll |
| FGE | Central Navigation and Control School RAF | CN & CS |
| FGE | Central Navigation School RAF | CNS |
| FGE | Empire Air Navigation School RAF | EANS |
| FGF | Central Navigation and Control School RAF | CN & CS |
| FGF | Central Navigation School RAF | CNS |
| FGF | Empire Air Navigation School RAF | EANS |
| FGG | Central Navigation and Control School RAF | CN & CS |
| FGG | Central Navigation School RAF | CNS |
| FGG | Empire Air Navigation School RAF | EANS |
| FGI | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGJ | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGK | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGL | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGM | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGN | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGP | Empire Test Pilots' School | ETPS |
| FGQ | Empire Test Pilots' School | ETPS |
| FGR | Empire Test Pilots' School | ETPS |
| FGT | Airborne Forces Experimental Establishment | AFEE |
| FGU | Airborne Forces Experimental Establishment | AFEE |
| FGV | Airborne Forces Experimental Establishment | AFEE |
| FGW | Airborne Forces Experimental Establishment | AFEE |
| FGX | Airborne Forces Experimental Establishment | AFEE |
| FH | No. 15 Operational Training Unit RAF | 15 OTU |
| FH | No. 258 Squadron RAF | 258 Sqn |
| FH | No. 53 Squadron RAF | 53 Sqn |
| FHA | No. 1 Elementary Flying Training School RAF | 1 EFTS |
| FHB | No. 1 Elementary Flying Training School RAF | 1 EFTS |
| FHC | No. 1 Elementary Flying Training School RAF | 1 EFTS |
| FHE | No. 2 Elementary Flying Training School RAF | 2 EFTS |
| FHF | No. 2 Elementary Flying Training School RAF | 2 EFTS |
| FHG | No. 2 Elementary Flying Training School RAF | 2 EFTS |
| FHI | No. 3 Elementary Flying Training School RAF | 3 EFTS |
| FHJ | No. 3 Elementary Flying Training School RAF | 3 EFTS |
| FHK | No. 3 Elementary Flying Training School RAF | 3 EFTS |
| FHM | No. 4 Elementary Flying Training School RAF | 4 EFTS |
| FHN | No. 4 Elementary Flying Training School RAF | 4 EFTS |
| FHO | No. 4 Elementary Flying Training School RAF | 4 EFTS |
| FHQ | No. 6 Elementary Flying Training School RAF | 6 EFTS |
| FHR | No. 6 Elementary Flying Training School RAF | 6 EFTS |
| FHS | No. 6 Elementary Flying Training School RAF | 6 EFTS |
| FHT | No. 6 Elementary Flying Training School RAF | 6 EFTS |
| FHV | No. 7 Elementary Flying Training School RAF | 7 EFTS |
| FHW | No. 7 Elementary Flying Training School RAF | 7 EFTS |
| FHX | No. 7 Elementary Flying Training School RAF | 7 EFTS |
| FHY | No. 7 Elementary Flying Training School RAF | 7 EFTS |
| FI | No. 1686 Flight RAF | 1686 Flt |
| FI | No. 83 Operational Training Unit RAF | 83 OTU |
| FI | Warwick Training Unit RAF | WTU |
| FIA | No. 11 Elementary Flying Training School RAF | 11 EFTS |
| FIB | No. 11 Elementary Flying Training School RAF | 11 EFTS |
| FIC | No. 11 Elementary Flying Training School RAF | 11 EFTS |
| FID | No. 11 Elementary Flying Training School RAF | 11 EFTS |
| FIJ | No. 15 Elementary Flying Training School RAF | 15 EFTS |
| FIK | No. 15 Elementary Flying Training School RAF | 15 EFTS |
| FIL | No. 15 Elementary Flying Training School RAF | 15 EFTS |
| FIN | No. 16 Elementary Flying Training School RAF | 16 EFTS |
| FIO | No. 16 Elementary Flying Training School RAF | 16 EFTS |
| FIP | No. 16 Elementary Flying Training School RAF | 16 EFTS |
| FIR | No. 17 Elementary Flying Training School RAF | 17 EFTS |
| FIS | No. 17 Elementary Flying Training School RAF | 17 EFTS |
| FIT | No. 17 Elementary Flying Training School RAF | 17 EFTS |
| FIV | No. 21 Elementary Flying Training School RAF | 21 EFTS |
| FIW | No. 21 Elementary Flying Training School RAF | 21 EFTS |
| FIX | No. 21 Elementary Flying Training School RAF | 21 EFTS |
| FIY | No. 21 Elementary Flying Training School RAF | 21 EFTS |
| FJ | No. 164 Squadron RAF | 164 Sqn |
| FJ | No. 261 Squadron RAF | 261 Sqn |
| FJ | No. 37 Squadron RAF | 37 Sqn |
| FJA | No. 22 Elementary Flying Training School RAF | 22 EFTS |
| FJB | No. 22 Elementary Flying Training School RAF | 22 EFTS |
| FJC | No. 22 Elementary Flying Training School RAF | 22 EFTS |
| FJD | No. 22 Elementary Flying Training School RAF | 22 EFTS |
| FJF | No. 24 Elementary Flying Training School RAF | 24 EFTS |
| FJG | No. 24 Elementary Flying Training School RAF | 24 EFTS |
| FJH | No. 24 Elementary Flying Training School RAF | 24 EFTS |
| FJJ | No. 28 Elementary Flying Training School RAF | 28 EFTS |
| FJK | No. 28 Elementary Flying Training School RAF | 28 EFTS |
| FJL | No. 28 Elementary Flying Training School RAF | 28 EFTS |
| FJN | No. 29 Elementary Flying Training School RAF | 29 EFTS |
| FJO | No. 29 Elementary Flying Training School RAF | 29 EFTS |
| FJP | No. 29 Elementary Flying Training School RAF | 29 EFTS |
| FJQ | No. 29 Elementary Flying Training School RAF | 29 EFTS |
| FJR | Central Gunnery School RAF | CGS |
| FJS | Central Gunnery School RAF | CGS |
| FJT | Central Gunnery School RAF | CGS |
| FJU | Central Gunnery School RAF | CGS |
| FJV | Central Gunnery School RAF | CGS |
| FJW | Central Gunnery School RAF | CGS |
| FJX | Central Gunnery School RAF | CGS |
| FK | No. 134 Squadron RAF | 134 Sqn |
| FK | No. 209 Squadron RAF | 209 Sqn |
| FK | No. 219 Squadron RAF | 219 Sqn |
| FKA | No. 1511 Beam Approach Training Flight RAF | 1511 B App.TFlt |
| FKB | No. 1511 Beam Approach Training Flight RAF | 1511 B App.TFlt |
| FKD | No. 1537 Beam Approach Training Flight RAF | 1537 B App.TFlt |
| FKF | No. 1547 Beam Approach Training Flight RAF | 1547 B App.TFlt |
| FKN | Flying Training Command Communication Flight RAF | FTCC Flt |
| FKO | No. 21 Group Communication Flight RAF | 21 Gp Comm Flt |
| FKP | No. 23 Group Communication Flight RAF | 23 Gp Comm Flt |
| FKQ | No. 25 Group Communication Flight RAF | 25 Gp Comm Flt |
| FKR | No. 54 Group Communication Flight RAF | 54 Gp Comm Flt |
| FKS | Station Flight RAF Cranwell | |
| FL | No. 155 Squadron RAF | 155 Sqn |
| FL | No. 81 Squadron RAF | 81 Sqn |
| FLA | Cambridge University Air Squadron | Camb UAS |
| FLB | Aberdeen University Air Squadron | Ab UAS |
| FLC | Edinburgh University Air Squadron | Edin UAS |
| FLD | Glasgow University Air Squadron | Glas UAS |
| FLE | Queens University Air Squadron | Queens UAS |
| FLF | St. Andrews University Air Squadron | St. And UAS |
| FLG | Liverpool University Air Squadron | Liv UAS |
| FLH | Manchester University Air Squadron | Man UAS |
| FLI | Leeds University Air Squadron | Leeds UAS |
| FLJ | Durham University Air Squadron | Dur UAS |
| FLK | Birmingham University Air Squadron | Birm UAS |
| FLL | Nottingham University Air Squadron | Nott UAS |
| FLM | Bristol University Air Squadron | Brist UAS |
| FLN | Swansea University Air Squadron | Swan UAS |
| FLO | London University Air Squadron | Lon UAS |
| FLO | University of London Air Squadron | ULUAS |
| FLP | Southampton University Air Squadron | Soton UAS |
| FLQ | Oxford University Air Squadron | Ox UAS |
| FLR | Perth University Air Squadron | Perth UAS |
| FLS | Wolverhampton University Air Squadron | Wolv UAS |
| FLT | Derby University Air Squadron | Der UAS |
| FLU | Yatesbury University Air Squadron | Yates UAS |
| FLV | Cambridge University Air Squadron | Camb UAS |
| FM | No. 238 Squadron RAF | 238 Sqn |
| FM | No. 257 Squadron RAF | 257 Sqn |
| FM | No. 518 Squadron RAF | 518 Sqn |
| FMA | No. 201 Advanced Flying School RAF | 201 AFS |
| FMB | No. 201 Advanced Flying School RAF | 201 AFS |
| FMC | No. 201 Advanced Flying School RAF | 201 AFS |
| FME | No. 202 Advanced Flying School RAF | 202 AFS |
| FMF | No. 202 Advanced Flying School RAF | 202 AFS |
| FMG | No. 202 Advanced Flying School RAF | 202 AFS |
| FMI | No. 203 Advanced Flying School RAF | 203 AFS |
| FMJ | No. 203 Advanced Flying School RAF | 203 AFS |
| FMK | No. 203 Advanced Flying School RAF | 203 AFS |
| FMO | No. 204 Advanced Flying School RAF | 204 AFS |
| FN | No. 125 Squadron RAF | 125 Sqn |
| FN | No. 331 (Norway) Squadron RAF | 331 Norwegian Sqn |
| FN | No. 453 Squadron RAAF (June–August 1942) | 453 Sqn RAAF (sometimes 453 RAAF Sqn) in Malaya/Singapore |
| FO | No. 1665 Conversion Unit RAF | 1665 CU |
| FO | No. 75 Squadron RAF | 85 Sqn |
| FO | Station Flight RAF Wick | |
| FP | No. 1683 Flight RAF | 1683 Flt |
| FQ | No. 12 Operational Training Unit RAF | 12 OTU |
| FR | No. 348 Squadron RAF | 348 Sqn (not formed) |
| FR | Station Flight RAF Manston | |
| FS | No. 148 Squadron RAF | 148 Sqn |
| FS | No. 506 Squadron RAF | 506 Sqn (not formed) |
| FT | No. 290 Squadron RAF | 290 Sqn |
| FT | No. 43 Squadron RAF | 43 Sqn |
| FT | Station Flight RAF Mildenhall | |
| FU | No. 453 Squadron RAAF (1942–46) | 453 Sqn RAAF (sometimes 453 RAAF Sqn); in Europe |
| FV | No. 13 Operational Training Unit RAF | 13 OTU |
| FV | No. 205 Squadron RAF | 205 Sqn |
| FV | No. 230 Squadron RAF | 230 Sqn |
| FW | No. 194 Squadron RAF | 194 Sqn |
| FW | Station Flight RAF Rivenhall | |
| FX | No. 234 Squadron RAF | 234 Sqn |
| FX | No. 266 Squadron RAF | 266 Sqn |
| FX | No. 34 Operational Training Unit RAF | 34 OTU |
| FX | No. 6 Squadron RAAF | 6 Sqn RAAF* |
| FY | No. 34 Operational Training Unit RAF | 34 OTU |
| FY | No. 4 Squadron RAF | 4 Sqn |
| FY | No. 611 Squadron RAF | 611 Sqn |
| FZ | No. 23 Operational Training Unit RAF | 23 OTU |
| FZ | No. 65 Squadron RAF | 65 Sqn |
| FZ | No. 94 Squadron RAF | 94 Sqn |
| G | Joint Anti-Submarine School Flight RAF | JASS Flt |
| G | No. 19 Flying Training School RAF | 19 FTS |
| G | No. 2 Flying Training School RAF | 2 FTS |
| G | No. 20 Squadron RAF | 20 Sqn |
| G | No. 4 Flying Training School RAF | 4 FTS |
| G | No. 43 Squadron RAF | 43 Sqn |
| G | No. 5 Flying Training School RAF | 5 FTS |
| G | No. 54 Squadron RAF | 54 Sqn |
| G | No. 6 Flying Training School RAF | 6 FTS |
| G | No. 81 Squadron RAF | 81 Sqn |
| G2 | No. 19 Group Communication Flight RAF | 19 Gp Comm Flt |
| G4 | Station Flight RAF Skellingthorpe | |
| G7 | Bomber Command Film Unit | BCFU |
| G8 | Station Flight RAF Wing | |
| G9 | No. 430 Squadron RCAF | 430 Sqn RCAF (sometimes 430 (RCAF) Sqn) |
| GA | No. 112 Squadron RAF | 112 Sqn |
| GA | No. 16 Operational Training Unit RAF | 16 OTU |
| GA | No. 208 Squadron RAF | 208 Sqn |
| GA | No. 21 Squadron RAAF (1941–42) | 21 Sqn RAAF (sometimes 21 RAAF Sqn); Malaya/Singapore. |
| GB | No. 100 Squadron RAF | 100 Sqn |
| GB | No. 105 Squadron RAF | 105 Sqn |
| GB | No. 166 Squadron RAF | 166 Sqn |
| GB | No. 83 Squadron RAF | 83 Sqn |
| GB | No. 97 Squadron RAF | 97 Sqn |
| GC | Station Flight RAF Pershore | |
| GD | Station Flight RAF Horsham St Faith | |
| GE | No. 349 (Belgium) Squadron RAF | 349 (Belgian Sqn) |
| GE | No. 58 Squadron RAF | 58 Sqn |
| GF | No. 1 Tactical Exercise Unit RAF | 1 TEU |
| GF | No. 56 Operational Training Unit RAF | 56 OTU |
| GG | No. 151 Squadron RAF | 151 Sqn |
| GG | No. 1667 Conversion Unit RAF | 1667 CU |
| GH | No. 285 Squadron RAF | 285 Sqn |
| GI | No. 622 Squadron RAF | 622 Sqn |
| GK | No. 459 Squadron RAAF | 459 Sqn RAAF (sometimes 459 RAAF Sqn) |
| GK | No. 52 Operational Training Unit RAF | 52 OTU |
| GK | No. 80 Squadron RAF | 80 Sqn |
| GL | No. 14 Operational Training Unit RAF | 14 OTU |
| GL | No. 1529 Flight RAF | 1529 Flt |
| GL | 5 Squadron SAAF | 5 Sqn SAAF |
| GL | No. 175 Squadron RAF | 175 Sqn |
| GL | No. 185 Squadron RAF | 185 Sqn |
| GL | Station Flight RAF Duxford | |
| GM | No. 55 Squadron RAF | 55 Sqn |
| GM | No. 74 Squadron RAF | 84 Sqn |
| GN | Central Bomber Establishment RAF | CBE |
| GN | No. 249 Squadron RAF | 249 Sqn |
| GN | No. 323 Squadron RAF | 323 Sqn (not formed) |
| GO | Central Fighter Establishment RAF | CFE |
| GO | No. 135 Squadron RAF | 135 Sqn |
| GO | No. 94 Squadron RAF | 94 Sqn |
| GP | No. 1661 Conversion Unit RAF | 1661 CU |
| GP | No. 187 Squadron RAF | 187 Sqn |
| GQ | No. 134 Squadron RAF | 134 Sqn |
| GQ | Station Flight RAF North Killingholme | |
| GR | No. 1586 Flight RAF | 1586 Flt |
| GR | No. 301 Polish Bomber Squadron | 301 Polish Sqn |
| GR | No. 92 Squadron RAF | 92 Sqn |
| GS | No. 190 Squadron RAF | 190 Sqn |
| GS | No. 297 Squadron RAF | 297 Sqn |
| GS | No. 330 (Norway) Squadron RAF | 330 Norwegian Sqn |
| GS | No. 83 Operational Training Unit RAF | 83 OTU |
| GT | No. 156 Squadron RAF | 156 Sqn |
| GT | No. 344 (French) Squadron RAF | 344 French Sqn |
| GU | No. 18 Squadron RAF | 18 Sqn |
| GV | No. 103 Squadron RAF | 103 Sqn |
| GV | No. 1652 Conversion Unit RAF | 1652 CU |
| GW | No. 252 Squadron RAF | 252 Sqn |
| GW | No. 340 (French) Squadron RAF | 340 French Sqn |
| GX | No. 415 Squadron RCAF | 415 Sqn RCAF (sometimes 415 (RCAF) Sqn) |
| GX | No. 507 Squadron RAF | 507 Sqn (not formed) |
| GX | Station Flight RAF Broadwell | |
| GY | No. 109 (Transport) Operational Training Unit RAF | 109 (T)OTU |
| GY | No. 1383 Conversion Unit RAF | 1383 CU |
| GZ | No. 12 Squadron RAF | 12 Sqn |
| GZ | No. 32 Squadron RAF | 32 Sqn |
| GZ | No. 611 Squadron RAF | 611 Sqn |
| H | No. 111 Squadron RAF | 111 Sqn |
| H | No. 1340 Flight RAF | 1340 Flt |
| H | No. 19 Flying Training School RAF | 19 FTS |
| H | No. 4 Flying Training School RAF | 4 FTS |
| H | No. 5 (Pilots) Advanced Flying Unit | 5 (P)AFU |
| H | School of Maritime Reconnaissance RAF | S OF MR |
| H7 | No. 346 (French) Squadron RAF | 346 French Sqn |
| H8 | No. 42 (Belgian) Squadron RAF | 42 (Belgian) Sqn |
| H9 | Station Flight RAF Shepherds Grove | |
| HA | No. 218 Squadron RAF | 218 Sqn |
| HA | No. 649 Squadron RAF | 649 Sqn (not formed) |
| HB | No. 229 Squadron RAF | 229 Sqn |
| HB | No. 239 Squadron RAF | 239 Sqn |
| HC | No. 512 Squadron RAF | 512 Sqn |
| HD | No. 311 (Czech) Squadron RAF | 311 Czech Sqn |
| HD | No. 38 Squadron RAF | 38 Sqn |
| HD | No. 466 Squadron RAAF | 466 Sqn RAAF (sometimes 466 RAAF Sqn) |
| HE | No. 263 Squadron RAF | 263 Sqn |
| HE | No. 605 Squadron RAF | 605 Sqn |
| HF | No. 127 Squadron RAF | 127 Sqn |
| HF | No. 183 Squadron RAF | 183 Sqn |
| HF | No. 54 Squadron RAF | 54 Sqn |
| HG | No. 154 Squadron RAF | 154 Sqn |
| HG | No. 332 (Norway) Squadron RAF | 332 Sqn |
| HH | No. 175 Squadron RAF | 175 Sqn |
| HH | No. 273 Squadron RAF | 273 Sqn |
| HI | No. 63 Operational Training Unit RAF | 63 OTU |
| HI | No. 66 Squadron RAF | 66 Sqn |
| HJ | No. 254 Squadron RAF | 254 Sqn |
| HK | Fighter Leaders School RAF | FLS |
| HK | No. 269 Squadron RAF | 269 Sqn |
| HK | No. 306 (Polish) Squadron RAF | 306 Polish Sqn |
| HL | No. 26 Squadron RAF | 26 Sqn |
| HL | Station Flight RAF Gransden Lodge | |
| HM | No. 136 Squadron RAF | 136 Sqn |
| HM | No. 1667 Flight RAF | 1667 Flt |
| HN | No. 20 Squadron RAF | 20 Sqn |
| HN | No. 93 Squadron RAF | 93 Sqn |
| HP | Gunnery Research Unit RAF | GRU |
| HP | No. 247 Squadron RAF | 247 Sqn |
| HP | Station Flight RAF Full Sutton | |
| HQ | No. 56 Operational Training Unit RAF | 56 OTU |
| HQ | No. 91 Squadron RAF | 91 Sqn |
| HR | North-East Sector Communication Flight RAF | N-ES Comm Flt |
| HS | No. 109 Squadron RAF | 109 Sqn |
| HS | No. 170 Squadron RAF | 170 Sqn |
| HS | No. 260 Squadron RAF | 260 Sqn |
| HT | No. 154 Squadron RAF | 154 Sqn |
| HT | No. 158 Squadron RAF | 158 Sqn |
| HT | No. 601 Squadron RAF | 601 Sqn |
| HU | No. 220 Squadron RAF | 220 Sqn |
| HU | No. 406 Squadron RCAF | 406 Sqn RCAF (sometimes 406 (RCAF) Sqn) |
| HV | No. 73 Squadron RAF | 83 Sqn |
| HV | No. 8 Squadron RAF | 8 Sqn |
| HV | Station Flight RAF East Kirkby | |
| HW | No. 100 Squadron RAF | 100 Sqn |
| HX | No. 203 Advanced Flying School RAF | 203 AFS |
| HX | No. 226 Operational Conversion Unit RAF | 226 OCU |
| HX | No. 295 Squadron RAF | 295 Sqn |
| HX | No. 61 Operational Training Unit RAF | 61 OTU |
| HY | No. 88 Squadron RAF | 88 Sqn |
| HZ | No. 44 Group Communication Flight RAF | 44 Gp Comm Flt |
| I | Central Flying School | CFS |
| I2 | No. 48 Squadron RAF | 48 Sqn |
| I4 | No. 567 Squadron RAF | 567 Sqn |
| I5 | No. 105 Operational Training Unit RAF | 105 OTU |
| I5 | No. 1381 Conversion Unit RAF | 1381 CU |
| I6 | No. 32 Maintenance Unit RAF | 32 MU |
| I8 | No. 440 Squadron RCAF | 440 Sqn RCAF (sometimes 440 (RCAF) Sqn) |
| I9 | No. 575 Squadron RAF | 575 Sqn |
| IA | Station Flight RAF Syerston | |
| IB | Glider pick-up Training Flight RAF | GPUT Flt |
| IB | No. 43 Group Communication Flight RAF | 43 Gp Comm Flt |
| IC | No. 623 Squadron RAF | 623 Sqn |
| IF | No. 84 Operational Training Unit RAF | 48 OTU |
| II | No. 116 Squadron RAF | 116 Sqn |
| II | No. 59 Operational Training Unit RAF | 59 OTU |
| IK | Bomber Command Instructors School RAF | BCIS |
| IL | No. 115 Squadron RAF | 115 Sqn |
| IN | Station Flight RAF Valley | |
| IP | Bomber Command Instructors School RAF | BCIS |
| IQ | No. 150 Squadron RAF | 150 Sqn |
| IV | Station Flight RAF Upper Heyford | |
| IW | Station Flight RAF Chilbolton | |
| IY | Station Flight RAF Dunsfold | |
| J | No. 111 Operational Training Unit RAF | 111 OTU |
| J | No. 26 Squadron RAF | 26 Sqn |
| J | No. 27 Squadron RAF | 27 Sqn |
| J | RAF College Flying Training School | RAF Coll FTS |
| J5 | No. 3 Squadron RAF | 3 Sqn |
| J6 | No. 1521 Flight RAF | 1521 Flt |
| J7 | No. 8 Maintenance Unit RAF | 8 MU |
| J8 | No. 24 Maintenance Unit RAF | 24 MU |
| J9 | No. 1668 Conversion Unit RAF | 1668 CU |
| JA | No. 1652 Conversion Unit RAF | 1652 CU |
| JB | No. 1380 Conversion Unit RAF | 1380 CU |
| JB | No. 190 Squadron RAF | 190 Sqn |
| JB | No. 81 Operational Training Unit RAF | 81 OTU |
| JC | No. 11 Group Communication Flight RAF | 11 Gp Comm Flt |
| JD | Station Flight RAF Grimsetter | |
| JE | No. 195 Squadron RAF | 195 Sqn |
| JE | No. 610 Squadron RAF | 610 Sqn |
| JF | No. 1654 Conversion Unit RAF | 1654 CU |
| JF | No. 3 Squadron RAF | 3 Sqn |
| JG | No. 17 Operational Training Unit RAF | 17 OTU |
| JH | No. 317 (Polish) Squadron RAF | 317 Polish Sqn |
| JH | No. 74 Squadron RAF | 84 Sqn |
| JI | No. 514 Squadron RAF | 514 Sqn |
| JJ | No. 160 Squadron RAF | 160 Sqn |
| JJ | No. 274 Squadron RAF | 274 Sqn |
| JL | No. 10 Operational Training Unit RAF | 10 OTU |
| JL | No. 520 Squadron RAF | 520 Sqn |
| JM | No. 184 Squadron RAF | 184 Sqn |
| JM | No. 20 Operational Training Unit RAF | 20 OTU |
| JM | No. 32 Squadron RAAF | 32 Sqn RAAF* |
| JN | No. 150 Squadron RAF | 150 Sqn |
| JN | No. 268 Squadron RAF | 268 Sqn |
| JN | No. 30 Squadron RAF | 30 Sqn |
| JN | No. 75 Squadron RAF | 85 Sqn |
| JO | No. 463 Squadron RAAF | 463 Sqn RAAF (sometimes 463 RAAF Sqn) |
| JO | No. 62 Squadron RAF | 62 Sqn |
| JP | No. 12 Operational Training Unit RAF | 12 OTU |
| JP | No. 21 Squadron RAF | 21 Sqn |
| JQ | No. 169 Squadron RAF | 169 Sqn |
| JQ | No. 2 Anti-aircraft Co-operation Unit RAF | 2 AACU |
| JQ | Station Flight RAF Breighton | |
| JR | No. 161 Squadron RAF | 161 Sqn |
| JS | No. 16 Operational Training Unit RAF | 16 OTU |
| JS | No. 321 (Netherlands) Squadron RAF | 321 Dutch Sqn |
| JT | No. 182 Squadron RAF | 182 Sqn |
| JT | No. 256 Squadron RAF | 256 Sqn |
| JU | No. 111 Squadron RAF | 111 Sqn |
| JU | No. 202 Squadron RAF | 202 Sqn |
| JV | No. 283 Squadron RAF | 283 Sqn |
| JV | No. 6 Squadron RAF | 6 Sqn |
| JV | Station Flight RAF Finningley | |
| JW | Central Fighter Establishment | CFE |
| JW | No. 44 Squadron RAF | 44 Sqn |
| JX | No. 1 Squadron RAF | 1 Sqn |
| JY | No. 121 Squadron RAF | 121 Sqn |
| JZ | No. 57 Operational Training Unit RAF | 57 OTU |

### K-O

| Squadron code | Unit | Unit shorthand |
| K | Central Flying School | CFS |
| K | No. 1 Flying Training School RAF | 1 FTS |
| K1 | 'K' Flight No. 1 Anti-Aircraft Co-operation Unit RAF | 'K' Flt 1 AACU |
| K2 | No. 2 Group Communication Flight RAF | 2 Gp Comm Flt |
| K5 | Station Flight RAF Pocklington | |
| K7 | No. 236 Operational Conversion Unit RAF | 236 OCU |
| K7 | No. 6 Operational Training Unit RAF | 6 OTU |
| K8 | Station Flight RAF Wymeswold | |
| K9 | Station Flight RAF Tain | |
| KA | No. 1685 Flight RAF | 1685 Flt |
| KA | No. 9 Squadron RAF | 9 Sqn |
| KB | No. 142 Squadron RAF | 142 Sqn |
| KB | No. 1661 Conversion Unit RAF | 1661 CU |
| KC | No. 238 Squadron RAF | 238 Sqn |
| KC | No. 617 Squadron RAF | 617 Sqn |
| KD | No. 154 Squadron RAF | 154 Sqn |
| KD | No. 226 Operational Conversion Unit RAF | 226 OCU |
| KD | No. 30 Operational Training Unit RAF | 30 OTU |
| KE | Merchant Ship Flying Unit RAF | MSFU |
| KE | No. 330 (Norway) Squadron RAF | 330 Norwegian Sqn |
| KF | No. 1662 Conversion Unit RAF | 1662 CU |
| KF | No. 645 Squadron RAF | 645 Sqn (not formed) |
| KG | No. 1380 Conversion Unit RAF | 1380 CU |
| KG | No. 196 Squadron RAF | 196 Sqn |
| KG | No. 204 Squadron RAF | 204 Sqn |
| KG | No. 81 Operational Training Unit RAF | 81 OTU |
| KH | No. 11 Operational Training Unit RAF | 11 OTU |
| KH | No. 403 Squadron RCAF | 403 Sqn RCAF (sometimes 403 (RCAF) Sqn) |
| KI | Station Flight RAF Coningsby | |
| KJ | No. 11 Operational Training Unit RAF | 11 OTU |
| KJ | No. 16 Squadron RAF | 16 Sqn |
| KJ | 4 Squadron SAAF | 4 Sqn SAAF |
| KK | No. 15 Operational Training Unit RAF | 15 OTU |
| KK | No. 333 (Norway) Squadron RAF | 333 Norwegian Sqn |
| KK | No. 624 Squadron RAF "Polish Flight" (Balkan Air Force) | 624 Sqn Polish Flight |
| KL | No. 269 Squadron RAF | 269 Sqn |
| KL | No. 54 Squadron RAF | 54 Sqn |
| KM | No. 205 Squadron RAF | 205 Sqn |
| KM | No. 44 Squadron RAF | 44 Sqn |
| KN | No. 339 Squadron RAF | 339 Sqn (not formed) |
| KN | No. 77 Squadron RAF | 77 Sqn |
| KO | No. 115 Squadron RAF | 115 Sqn |
| KO | No. 2 Squadron RAAF | 2 Sqn RAAF* |
| KP | No. 226 Squadron RAF | 226 Sqn |
| KP | No. 409 Squadron RCAF | 409 Sqn RCAF (sometimes 409 (RCAF) Sqn) |
| KQ | No. 13 Operational Training Unit RAF | 13 OTU |
| KQ | No. 502 Squadron RAF | 502 Sqn |
| KR | No. 1667 Conversion Unit RAF | 1667 CU |
| KR | No. 226 Operational Conversion Unit RAF | 226 OCU |
| KR | No. 231 Squadron RAF | 231 Sqn |
| KR | No. 61 Operational Training Unit RAF | 61 OTU |
| KS | Station Flight RAF Tarrant Rushton | |
| KT | No. 32 Squadron RAF | 32 Sqn |
| KT | No. 54 Squadron RAF | 54 Sqn |
| KT | No. 7 Squadron RAAF | 7 Sqn RAAF* |
| KU | No. 265 Squadron RAF | 265 Sqn |
| KU | No. 47 Squadron RAF | 47 Sqn |
| KU | No. 53 Operational Training Unit RAF | 53 OTU |
| KV | No. 264 Squadron RAF | 264 Sqn |
| KV | No. 619 Squadron RAF | 619 Sqn |
| KW | No. 267 Squadron RAF "Riposte Opns." | 267 Sqn |
| KW | No. 312 (Czech) Squadron RAF | 312 Czech Sqn |
| KW | No. 425 Squadron RCAF | 425 Sqn RCAF (sometimes 425 (RCAF) Sqn) |
| KW | No. 615 Squadron RAF | 615 Sqn |
| KX | No. 1448 Flight RAF | 1448 Flt |
| KX | No. 311 (Czech) Squadron RAF | 311 Czech Sqn |
| KX | No. 529 Squadron RAF | 529 Sqn |
| KX | No. 639 Squadron RAF | 639 Sqn |
| KY | No. 162 Squadron RAF | 162 Sqn |
| KY | No. 242 Squadron RAF | 242 Sqn |
| KZ | No. 287 Squadron RAF | 287 Sqn |
| KZ | No. 296 Squadron RAF | 296 Sqn |
| L-Z | No. 421 Flight RAF | 421 Flt |
| L4 | No. 27 Maintenance Unit RAF | 27 MU |
| L5 | No. 297 Squadron RAF | 297 Sqn |
| L6 | No. 1669 Conversion Unit RAF | 1669 CU |
| L7 | No. 271 Squadron RAF | 271 Sqn |
| L8 | No. 347 (French) Squadron RAF | 347 French Sqn |
| L9 | No. 190 Squadron RAF | 190 Sqn |
| LA | No. 235 Squadron RAF | 235 Sqn |
| LA | No. 607 Squadron RAF | 607 Sqn |
| LB | No. 28 Operational Training Unit RAF | 28 OTU |
| LB | No. 34 Squadron RAF | 34 Sqn |
| LC | Station Flight RAF Feltwell | |
| LD | No. 108 Squadron RAF | 108 Sqn |
| LD | No. 117 Squadron RAF | 117 Sqn |
| LD | No. 250 Squadron RAF | 250 Sqn |
| LD | No. 331 (Norway) Squadron RAF | 331 Norwegian Sqn |
| LE | No. 242 Squadron RAF | 242 Sqn |
| LE | No. 40 Squadron RAF | 40 Sqn |
| LE | No. 630 Squadron RAF | 630 Sqn |
| LF | No. 172 Squadron RAF | 172 Sqn |
| LF | No. 37 Squadron RAF | 37 Sqn |
| LF | Station Flight RAF Predannack | |
| LG | No. 13 Group Communication Flight RAF | 13 Gp Comm Flt |
| LG | No. 215 Squadron RAF | 215 Sqn |
| LG | No. 89 Squadron RAF | 89 Sqn |
| LH | No. 313 (Czech) Squadron RAF | 313 Czech Sqn |
| LH | Station Flight RAF Mepal | |
| LJ | No. 211 Squadron RAF | 211 Sqn |
| LJ | No. 600 Squadron RAF | 600 Sqn |
| LJ | No. 614 Squadron RAF | 614 Sqn |
| LJ | No. 614A Squadron RAF | 614A Sqn |
| LK | No. 342 (French) Squadron RAF | 342 French Sqn |
| LK | No. 51 Squadron RAF | 51 Sqn |
| LK | No. 578 Squadron RAF | 578 Sqn |
| LK | No. 87 Squadron RAF | 87 Sqn |
| LL | No. 1513 Flight RAF | 1513 Flt |
| LM | No. 189 Squadron RAF | 189 Sqn |
| LM | Station Flight RAF Elsham Wolds | |
| LN | No. 183 Squadron RAF | 183 Sqn |
| LN | No. 83 Group Communication Flight RAF | 83 Gp Comm Flt RAF |
| LN | No. 99 Squadron RAF | 99 Sqn |
| LO | No. 602 Squadron RAF | 602 Sqn |
| LO | No. 62? Squadron RAF | 62? Sqn |
| LO | No. 632 Squadron RAF | 632 Sqn (not formed) |
| LP | No. 237 Operational Conversion Unit RAF | 237 OCU |
| LP | No. 327 (French) Squadron RAF | 327 French Sqn |
| LQ | No. 405 Squadron RCAF | 405 Sqn RCAF (sometimes 405 (RCAF) Sqn) |
| LQ | No. 629 Squadron RAF | 629 Sqn (not formed) |
| LR | No. 1667 Conversion Unit RAF | 1667 CU |
| LR | No. 31 Operational Training Unit RAF | 31 OTU |
| LR | No. 56 Squadron RAF | 56 Sqn |
| LS | No. 15 Squadron RAF | 15 Sqn |
| LS | No. 61 Squadron RAF | 61 Sqn |
| LT | No. 22 Operational Training Unit RAF | 22 OTU |
| LT | No. 7 Squadron RAF | 7 Sqn |
| LU | Merchant Flying Unit RAF | MFU |
| LU | No. 101 Squadron RAF | 101 Sqn |
| LV | No. 57 Operational Training Unit RAF | 57 OTU |
| LW | No. 318 (Polish) Squadron RAF | 318 Polish Sqn |
| LW | No. 607 Squadron RAF | 607 Sqn |
| LW | No. 74 Wing Calibration Flight RAF | 74Wg. Cal. Flt |
| LW | No. 75 Wing Calibration Flight RAF | 75Wg. Cal. Flt |
| LW | No. 76 Wing Calibration Flight RAF | 76Wg. Cal. Flt |
| LX | No. 225 Squadron RAF | 225 Sqn |
| LX | No. 54 Operational Training Unit RAF | 54 OTU |
| LX | No. 614A Squadron RAF | 614A Sqn |
| LY | No. 1 Photographic Reconnaissance Unit RAF | 1 PRU |
| LY | No. 149 Squadron RAF | 149 Sqn |
| LY | No. 30 Squadron RAAF | 30 Sqn RAAF* |
| LY | Photographic Reconnaissance Unit | PRU |
| LZ | No. 66 Squadron RAF | 66 Sqn |
| LZ | No. 111 Squadron RCAF | 111 Sqn RCAF* |
| M | Central Flying School | CFS |
| M | No. 1 Flying Training School RAF | 1 FTS |
| M | No. 10 Advanced Flying Training School RAF | 10 AFTS |
| M | No. 102 Flying Refresher School RAF | 102 FRS |
| M | No. 111 Operational Training Unit RAF | 111 OTU |
| M | No. 202 Advanced Flying School RAF | 202 AFS |
| M | No. 205 Advanced Flying School RAF | 205 AFS |
| M | No. 206 Advanced Flying School RAF | 206 AFS |
| M | No. 215 Advanced Flying School RAF | 215 AFS |
| M | No. 22 Flying Training School RAF | 22 FTS |
| M | No. 22 Service Flying Training School RAF | 22 SFTS |
| M | No. 3 Flying Training School RAF | 3 FTS |
| M | No. 6 Flying Training School RAF | 6 FTS |
| M | No. 7 Flying Training School RAF | 7 FTS |
| M | No. 9 Advanced Flying Training School RAF | 9 AFTS |
| M | No. 9 Flying Training School RAF | 9 FTS |
| M1 | 'M' Flight No. 1 Anti-Aircraft Co-operation Unit RAF | 'M' Flt 1 AACU |
| M2 | No. 33 Maintenance Unit RAF | 33 MU |
| M4 | No. 587 Squadron RAF | 587 Sqn |
| M5 | No. 128 Squadron RAF | 128 Sqn |
| M6 | No. 83 Group Communication Flight RAF | 83 Gp Comm Flt |
| M7 | No. 41 Group Communication Flight RAF | 41 Gp Comm Flt |
| M8 | No. 4 Group Communication Flight RAF | 4 Gp Comm Flt |
| M9 | No. 1653 Conversion Unit RAF | 1653 CU |
| MA | No. 161 Squadron RAF | 161 Sqn |
| MA | No. 650 Squadron RAF | 650 Sqn |
| MA | No. 651 Squadron (Polish AOP Flight) RAF | 651 Sqn Polish AOP |
| MB | No. 220 Squadron RAF | 220 Sqn |
| MB | No. 236 Squadron RAF | 236 Sqn |
| MB | No. 52 Squadron RAF | 52 Sqn |
| MB | No. 651 Squadron (Polish AOP Flight) RAF | 651 Sqn Polish AOP |
| MC | No. 651 Squadron (Polish AOP Flight) RAF | 651 Sqn Polish AOP |
| MC | Station Flight RAF Fiskerton | |
| MD | No. 133 (Eagle) Squadron RAF | 133 Eagle Sqn |
| MD | No. 458 Squadron RAAF | 458 Sqn RAAF (sometimes 458 RAAF Sqn) |
| MD | No. 526 Squadron RAF | 526 Sqn |
| MD | No. 651 Squadron (Polish AOP Flight) RAF | 651 Sqn Polish AOP |
| ME | No. 488 Squadron RNZAF | 488 (RNZAF) Sqn)(sometimes 488 Sqn RNZAF |
| MF | Central Fighter Establishment RAF | CFE |
| MF | Fighter Leaders School RAF | FLS |
| MF | No. 108 Squadron RAF | 108 Sqn |
| MF | No. 280 Squadron RAF | 280 Sqn |
| MF | No. 59 Operational Training Unit RAF | 59 OTU |
| MG | No. 7 Squadron RAF | 7 Sqn |
| MH | No. 237 Squadron RAF | 237 Sqn |
| MH | No. 51 Squadron RAF | 51 Sqn |
| MJ | No. 1680 Flight RAF | 8016 Flt |
| MJ | No. 69 Squadron RAF | 69 Sqn |
| MJ | No. 21 Squadron RAAF (1943–45) | 21 Sqn RAAF (SW Pacific) |
| MK | No. 126 Squadron RAF | 126 Sqn |
| MK | No. 20 Operational Training Unit RAF | 20 OTU |
| MK | No. 500 Squadron RAF | 500 Sqn |
| ML | No. 12 Operational Training Unit RAF | 12 OTU |
| ML | No. 257 Squadron RAF | 257 Sqn |
| ML | No. 338 Squadron RAF | 338 Sqn (not formed) |
| MM | No. 291 Squadron RAF | 291 Sqn |
| MN | No. 328 (French) Squadron RAF | 328 French Sqn |
| MN | No. 350 (Belgian) Squadron RAF | 350 Belgian Sqn |
| MOTU | Maritime Operational Training Unit RAF | MOTU |
| MP | No. 246 Squadron RAF | 246 Sqn |
| MP | No. 76 Squadron RAF | 86 Sqn |
| MQ | No. 226 Squadron RAF | 226 Sqn |
| MQ | No. 642 Squadron RAF | 642 Sqn (not formed) |
| MR | No. 186 Squadron RAF | 186 Sqn |
| MR | No. 245 Squadron RAF | 245 Sqn |
| MR | No. 97 Squadron RAF | 97 Sqn |
| MS | Hornet Conversion Flight RAF | HC Flt |
| MS | No. 23 Squadron RAF | 23 Sqn |
| MS | No. 273 Squadron RAF | 273 Sqn |
| MS | Station Flight RAF Linton-on-Ouse | |
| MT | No. 105 Squadron RAF | 105 Sqn |
| MT | No. 122 Squadron RAF | 122 Sqn |
| MU | No. 274 Squadron RAF | 274 Sqn |
| MU | No. 60 Squadron RAF | 60 Sqn |
| MV | No. 53 Operational Training Unit RAF | 53 OTU |
| MV | No. 600 Squadron RAF | 600 Sqn |
| MW | No. 101 Squadron RAF | 101 Sqn |
| MW | No. 1641 Flight RAF | 1641 Flt |
| MW | No. 217 Squadron RAF | 217 Sqn |
| MW | No. 301 Polish Bomber Squadron | 301 Polish Sqn |
| MW | No. 5 Coastal Patrol Flight RAF | 5 CPF |
| MX | No. 120 Squadron RAF | 120 Sqn |
| MX | No. 1653 Conversion Unit RAF | 1653 CU |
| MX | Station Flight RAF Glatton | |
| MY | No. 27 Squadron RAF | 27 Sqn |
| MY | No. 278 Squadron RAF | 278 Sqn |
| MZ | No. 617 Squadron RAF | 617 Sqn |
| MZ | No. 83 Operational Training Unit RAF | 83 OTU |
| N | Central Flying School | CFS |
| N | Flying Refresher School RAF | FRS |
| N | No. 1 Flying Training School RAF | 1 FTS |
| N | No. 101 Flying Refresher School RAF | 101 FRS |
| N | No. 111 Operational Training Unit RAF | 111 OTU |
| N | No. 14 (Advanced) Flying Training School RAF | 14 (A)FTS |
| N | No. 2 Basic Air Navigation School RAF | 2 BANS |
| N | No. 2 Flying Training School RAF | 2 FTS |
| N | No. 202 Advanced Flying School RAF | 202 AFS |
| N | No. 215 Advanced Flying School RAF | 215 AFS |
| N | No. 22 Flying Training School RAF | 22 FTS |
| N | No. 22 Service Flying Training School RAF | 22 SFTS |
| N | No. 3 Flying Training School RAF | 3 FTS |
| N | No. 6 Flying Training School RAF | 6 FTS |
| N | No. 7 Flying Training School RAF | 7 FTS |
| N | RAF College Flying Training School | RAF Coll FTS |
| N7 | Station Flight RAF Lyneham | |
| N8 | Station Flight RAF Waterbeach | |
| N9 | Station Flight RAF Blackbushe | |
| N9 | Station Flight RAF Bückeburg | |
| NA | No. 1 Squadron RAAF (1943–45) | 1 Sqn RAAF; SW Pacific |
| NA | No. 428 Squadron RCAF | 428 Sqn RCAF (sometimes 428 (RCAF) Sqn) |
| NA | Station Flight RAF Manorbier | |
| NB | Fighter Command Communication Flight Training School RAF | FCCFTS |
| NB | Fighter Command Communication Squadron Training School RAF | FCCSTS |
| NB | No. 635 Squadron RAF | 635 Sqn |
| NC | No. 4 Squadron RAF | 4 Sqn |
| ND | No. 1666 Conversion Unit RAF | 1666 CU |
| ND | No. 236 Squadron RAF | 236 Sqn |
| ND | 11 Squadron SAAF | 11 Sqn SAAF |
| ND | No. 343 (French) Squadron RAF | 343 Sqn |
| NE | No. 143 Squadron RAF | 143 Sqn |
| NE | No. 63 Squadron RAF | 63 Sqn |
| NF | No. 138 Squadron RAF | 138 Sqn |
| NF | No. 488 Squadron RAF | 488 Sqn |
| NG | No. 604 Squadron RAF | 604 Sqn |
| NH | No. 119 Squadron RAF | 119 Sqn |
| NH | No. 274 Squadron RAF | 274 Sqn |
| NH | No. 38 Squadron RAF | 38 Sqn |
| NH | No. 415 Squadron RCAF | 415 Sqn RCAF (sometimes 415 (RCAF) Sqn) |
| NI | No. 451 Squadron RAAF | 451 Sqn RAAF (sometimes 451 RAAF Sqn) |
| NH | No. 530 Squadron RAF | 530 Sqn |
| NJ | Merchant Ship Flying Unit RAF | MSFU |
| NJ | No. 207 Squadron RAF | 207 Sqn |
| NK | No. 118 Squadron RAF | 118 Sqn |
| NK | No. 163 Squadron RAF | 163 Sqn |
| NK | No. 31 General Reconnaissance School RAF | 31 GRS |
| NL | No. 316 (Polish) Squadron RAF | 316 Polish Sqn |
| NL | No. 341 (French) Squadron RAF | 341 French Sqn |
| NM | No. 230 Squadron RAF | 230 Sqn |
| NM | No. 268 Squadron RAF | 268 Sqn |
| NM | No. 76 Squadron RAF | 86 Sqn |
| NN | No. 310 (Czech) Squadron RAF | 310 Czech Sqn |
| NN | No. 8 Squadron RAAF (1943–45) | 8 Sqn RAAF; SW Pacific |
| NO | No. 320 (Dutch) Squadron RAF | 320 Dutch Sqn |
| NO | No. 85 Squadron RAF | 85 Sqn |
| NP | No. 158 Squadron RAF | 158 Sqn |
| NP | No. 195 Squadron RAF | 195 Sqn |
| NQ | No. 24 Squadron RAF | 24 Sqn |
| NQ | No. 43 Squadron RAF | 43 Sqn |
| NR | No. 220 Squadron RAF | 220 Sqn |
| NR | No. 605 Squadron RAF | 605 Sqn |
| NS | No. 159 Squadron RAF | 159 Sqn |
| NS | No. 201 Squadron RAF | 201 Sqn |
| NS | No. 52 Operational Training Unit RAF | 52 OTU |
| NT | No. 203 Squadron RAF | 203 Sqn |
| NT | No. 29 Operational Training Unit RAF | 29 OTU |
| NU | No. 1382 Conversion Unit RAF | 1382 CU |
| NU | No. 240 Operational Conversion Unit RAF | 240 OCU |
| NU | No. 242 Operational Conversion Unit RAF | 242 OCU |
| NU | No. 625 Squadron RAF | 625 Sqn |
| NV | No. 144 Squadron RAF | 144 Sqn |
| NV | No. 79 Squadron RAF | 89 Sqn |
| NW | No. 286 Squadron RAF | 286 Sqn |
| NW | No. 3 Squadron RAAF (1940–41) | 3 Sqn RAAF (sometimes 3 RAAF Sqn) |
| NW | No. 33 Squadron RAF | 33 Sqn |
| NX | No. 131 Squadron RAF | 131 Sqn |
| NZ | No. 304 (Polish) Squadron RAF | 304 Polish Sqn |
| O | No. 202 Advanced Flying School RAF | 202 AFS |
| O | No. 203 Advanced Flying School RAF | 203 AFS |
| O | No. 205 Advanced Flying School RAF | 205 AFS |
| O | Central Flying School | CFS |
| O | Flying Refresher School RAF | FRS |
| O | No. 101 Flying Refresher School RAF | 10 FRS |
| O | No. 2 Flying Training School RAF | 2 FTS |
| O | No. 3 Flying Training School RAF | 3 FTS |
| O | No. 6 Flying Training School RAF | 6 FTS |
| O | No. 7 Flying Training School RAF | 7 FTS |
| O | No. 8 Flying Training School RAF | 8 FTS |
| O | No. 9 Flying Training School RAF | 9 FTS |
| O | No. 9 (Advanced) Flying Training School RAF | 9 (A) FTS |
| O | No. 22 Flying Training School RAF | 22 FTS |
| O | No. 22 Service Flying Training School RAF | 22 SFTS |
| OA | No. 2 Squadron RAF | 2 Sqn |
| OA | No. 223 Squadron RAF | 223 Sqn |
| OA | No. 329 (French) Squadron RAF | 329 French Sqn |
| OA | No. 342 (French) Squadron RAF | 342 French Sqn |
| OB | No. 45 Squadron RAF | 45 Sqn |
| OB | No. 260 Squadron RAF | 260 Sqn |
| OB | No. 53 Operational Training Unit RAF | 53 OTU |
| OC | Station Flight RAF Sandtoft | |
| OD | No. 80 Squadron RAF | 80 Sqn |
| OD | No. 6 Operational Training Unit RAF | 6 OTU |
| OD | No. 56 Operational Training Unit RAF | 56 OTU |
| OE | No. 98 Squadron RAF | 98 Sqn |
| OE | No. 168 Squadron RAF | 168 Sqn |
| OE | No. 661 Squadron RAF | 661 Sqn |
| OF | No. 97 Squadron RAF | 97 Sqn |
| OG | No. 172 Squadron RAF | 172 Sqn |
| OG | No. 315 (Polish) Squadron RAF | 315 Polish Sqn |
| OG | No. 1332 Conversion Unit RAF | 1332 CU |
| OG | No. 1665 Conversion Unit RAF | 1665 CU |
| OH | No. 120 Squadron RAF | 120 Sqn |
| OI | No. 2 Squadron RAF | 2 Sqn |
| OJ | No. 149 Squadron RAF | 149 Sqn |
| OK | No. 337 Squadron RAF | 337 Sqn (not formed) |
| OK | No. 450 Squadron RAAF | 450 Sqn RAAF (sometimes 450 RAAF Sqn) |
| OK | No. 3 School of General Reconnaissance RAF | 3 S of GR |
| OL | No. 83 Squadron RAF | 83 Sqn |
| OM | No. 11 Squadron RAF | 11 Sqn |
| OM | No. 107 Squadron RAF | 107 Sqn |
| OM | No. 119 Squadron RAF | 119 Sqn |
| ON | No. 56 Squadron RAF | 56 Sqn |
| ON | No. 63 Squadron RAF | 63 Sqn |
| ON | No. 124 Squadron RAF | 124 Sqn |
| ON | No. 623 Squadron RAF | 623 Sqn |
| OO | No. 13 Squadron RAF | 13 Sqn |
| OO | No. 164 Squadron RAF | 164 Sqn |
| OO | No. 1663 Conversion Unit RAF | 1663 CU |
| OP | No. 3 Squadron RAF | 3 Sqn |
| OP | No. 11 Operational Training Unit RAF | 11 OTU |
| OP | No. 32 Operational Training Unit RAF | 32 OTU |
| OQ | No. 52 Operational Training Unit RAF | 52 OTU |
| OQ | No. 5 Squadron RAF | 5 Sqn |
| OQ | Fighter Leaders School RAF | FLS |
| OR | Bomb Ballistic Unit RAF | BBU |
| OS | No. 279 Squadron RAF | 279 Sqn |
| OS | No. 349 (Belgium) Squadron RAF | 349 Belgian Sqn |
| OS | Station Flight RAF Sturgate | |
| OT | No. 58 Squadron RAF | 58 Sqn |
| OU | No. 485 Squadron RNZAF | 485 Sqn RNZAF (sometimes 485 (NZ) Sqn) |
| OV | No. 197 Squadron RAF | 197 Sqn |
| OV | No. 514 Squadron RAF | 514 Sqn |
| OW | No. 426 Squadron RCAF | 426 Sqn RCAF (sometimes 426 (RCAF) Sqn) |
| OX | No. 40 Squadron RAF | 40 Sqn |
| OX | No. 22 Operational Training Unit RAF | 22 OTU |
| OY | No. 13 Operational Training Unit RAF | 13 OTU |
| OY | No. 11 Squadron RAF | 11 Sqn |
| OY | No. 48 Squadron RAF | 48 Sqn |
| OZ | No. 82 Squadron RAF | 82 Sqn |
| OZ | No. 179 Squadron RAF | 179 Sqn |
| OZ | No. 210 Squadron RAF | 210 Sqn |
| OZ | 24 Squadron SAAF | 24 Sqn SAAF |
| O3 | Bomber Command Development Unit RAF | BCDU |
| O5 | Bomber Support Development Unit RAF | BSDU |
| O8 | Station Flight RAF Merryfield | |

### P-T

| Squadron code | Unit | Unit shorthand |
| P | No. 202 Advanced Flying School RAF | 202 AFS |
| P | No. 207 Advanced Flying School RAF | 207 AFS |
| P | No. 1 Flying Training School RAF | 1 FTS |
| P | No. 2 Flying Training School RAF | 2 FTS |
| P | No. 3 Flying Training School RAF | 3 FTS |
| P | No. 6 Flying Training School RAF | 6 FTS |
| P | No. 7 Flying Training School RAF | 7 FTS |
| P | No. 9 Flying Training School RAF | 9 FTS |
| P | No. 22 Flying Training School RAF | 22 FTS |
| P | No. 207 Flying Training School RAF | 207 FTS |
| P | No. 9 (Advanced) Flying Training School RAF | 9 (A)FTS |
| P | No. 10 (Advanced) Flying Training School RAF | 10 (A)FTS |
| P | No. 22 Service Flying Training School RAF | 22 SFTS |
| PA | No. 55 Operational Training Unit RAF | 55 OTU |
| PA | No. 655 Squadron RAF | 655 Sqn |
| PA | No. 3 Tactical Exercise Unit RAF | 3 TEU |
| PB | No. 10 Squadron RAF | 10 Sqn |
| PB | No. 655 Squadron RAF | 655 Sqn |
| PB | No. 1684 Flight RAF | 1684 Flt |
| PB | No. 26 Operational Training Unit RAF | 26 OTU |
| PC | No. 655 Squadron RAF | 655 Sqn |
| PD | No. 87 Squadron RAF | 87 Sqn |
| PD | No. 303 (Polish) Squadron RAF | 303 Polish Sqn (1945–46) |
| PD | No. 450 Squadron RAAF | 450 Sqn RAAF (sometimes 450 RAAF Sqn) |
| PD | No. 655 Squadron RAF | 655 Sqn |
| PE | No. 1662 Conversion Unit RAF | 1662 CU |
| PF | No. 516 Squadron RAF | 516 Sqn |
| PF | No. 43 Operational Training Unit RAF | 43 OTU |
| PF | No. 51 Operational Training Unit RAF | 51 OTU |
| PF | No. 227 Operational Training Unit RAF | 227 OTU |
| PF | Air Observation Post School RAF | AOPS |
| PG | No. 608 (North Riding) Squadron RAF | 608 Sqn |
| PG | No. 619 Squadron RAF | 619 Sqn |
| PH | No. 12 Squadron RAF | 12 Sqn |
| PI | Station Flight RAF Silverstone | |
| PJ | No. 59 Squadron RAF | 59 Sqn |
| PJ | No. 130 Squadron RAF | 130 Sqn |
| PK | No. 124 Squadron RAF | 124 Sqn |
| PK | No. 220 Squadron RAF | 220 Sqn |
| PK | No. 315 (Polish) Squadron RAF | 315 Polish Sqn |
| PL | No. 144 Squadron RAF | 144 Sqn |
| PL | No. 341 (French) Squadron RAF | 341 French Sqn |
| PM | No. 20 Squadron RAF | 20 Sqn |
| PM | No. 103 Squadron RAF | 103 Sqn |
| PN | No. 41 Squadron RAF | 41 Sqn |
| PN | No. 252 Squadron RAF | 252 Sqn |
| PN | No. 1552 Flight RAF | 1552 Flt |
| PO | No. 46 Squadron RAF | 46 Sqn |
| PO | No. 104 Squadron RAF | 104 Sqn |
| PO | No. 463 Squadron RAAF | 463 Sqn RAAF (sometimes 463 RAAF Sqn) |
| PO | No. 467 Squadron RAAF | 467 Sqn RAAF (sometimes 467 RAAF Sqn) |
| PP | No. 203 Squadron RAF | 203 Sqn |
| PP | No. 311 (Czech) Squadron RAF | 311 Czech Sqn |
| PP | No. 25 Operational Training Unit RAF | 25 OTU |
| PQ | No. 206 Squadron RAF | 206 Sqn |
| PQ | No. 324 Squadron RAF | 324 Sqn (not formed) |
| PQ | No. 2 Tactical Exercise Unit RAF | 2 TEU |
| PQ | No. 58 Operational Training Unit RAF | 58 OTU |
| PR | No. 407 Squadron RCAF | 407 Sqn RCAF (sometimes 407 (RCAF) Sqn) |
| PR | No. 609 (West Riding) Squadron RAF | 609 Sqn |
| PS | No. 264 Squadron RAF | 264 Sqn |
| PT | No. 27 Squadron RAF | 27 Sqn |
| PT | No. 420 Squadron RCAF | 420 Sqn RCAF (sometimes 420 (RCAF) Sqn) |
| PU | No. 53 Squadron RAF | 53 Sqn |
| PU | No. 187 Squadron RAF | 187 Sqn |
| PU | No. 198 Squadron RAF | 198 Sqn |
| PV | No. 275 Squadron RAF | 275 Sqn |
| PW | No. 224 Squadron RAF | 224 Sqn |
| PW | No. 57 Operational Training Unit RAF | 57 OTU |
| PX | No. 95 Squadron RAF | 95 Sqn |
| PX | No. 214 Squadron RAF | 214 Sqn |
| PY | No. 84 Squadron RAF | 84 Sqn |
| PY | No. 1527 Flight RAF | 1527 Flt |
| PZ | No. 53 Squadron RAF | 53 Sqn |
| PZ | No. 456 Squadron RAAF | 456 Sqn RAAF (sometimes 456 RAAF Sqn) |
| PZ | No. 638 Squadron RAF | 638 Sqn (not formed) |
| P2 | Station Flight RAF Marston Moor | |
| P3 | No. 692 Squadron RAF | 692 Sqn |
| P4 | No. 153 Squadron RAF | 153 Sqn |
| P5 | No. 297 Squadron RAF | 297 Sqn |
| P6 | No. 489 Squadron RNZAF | 489 (RNZAF) Sqn (sometimes 489 Sqn RNZAF) |
| P6 | Station Flight RAF Banff | |
| P8 | No. 87 Group Communication Flight RAF | 87 Gp Comm Flt |
| P8 | No. 87 Wing Communication Flight RAF | 87 Wg Comm Flt |
| P9 | No. 58 Operational Training Unit RAF | 58 OTU |
| Q | Air/Sea Warfare Development Unit RAF | A/SWDU |
| Q | Central Flying School | CFS |
| Q | No. 2 Flying Training School RAF | 2 FTS |
| Q | No. 3 Flying Training School RAF | 3 FTS |
| Q | No. 7 Flying Training School RAF | 7 FTS |
| Q | No. 14 (Advanced) Flying Training School RAF | 14 (A)FTS |
| QA | No. 654 Squadron RAF | 654 Sqn |
| QB | No. 212 Squadron RAF | 212 Sqn |
| QB | No. 424 Squadron RCAF | 424 Sqn RCAF (sometimes 424 (RCAF) Sqn) |
| QB | No. 654 Squadron RAF | 654 Sqn |
| QC | No. 168 Squadron RAF | 168 Sqn |
| QC | No. 654 Squadron RAF | 654 Sqn |
| QD | No. 654 Squadron RAF | 654 Sqn |
| QD | No. 42 Squadron RAF | 42 Sqn |
| QD | No. 304 (Polish) Squadron RAF | 304 Polish Sqn |
| QE | No. 12 Squadron RAF | 12 Sqn |
| QE | Central Fighter Establishment | CFE |
| QF | No. 98 Squadron RAF | 98 Sqn |
| QF | No. 177 Squadron RAF | 177 Sqn |
| QF | No. 1323 Flight RAF | 1323 Flt |
| QF | Navigation Training Unit RAF | NTU |
| QG | No. 53 Operational Training Unit RAF | 53 OTU |
| QH | No. 298 Squadron RAF | 298 Sqn |
| QH | No. 302 (Polish) Squadron RAF | 302 Polish Sqn (1945–46) |
| QI | Station Flight RAF Swanton Morley | |
| QJ | No. 92 Squadron RAF | 92 Sqn |
| QJ | No. 616 Squadron RAF | 616 Sqn |
| QJ | British Air Forces of Occupation Communication Squadron RAF | BAFO Comm Sqn. |
| QK | No. 248 Squadron RAF | 248 Sqn |
| QK | No. 3 Armament Practice Station RAF | 3 APS |
| QL | No. 286 Squadron RAF | 286 Sqn |
| QL | No. 413 Squadron RCAF | 424 Sqn RCAF (sometimes 413 (RCAF) Sqn) |
| QL | No. 76 Wing Calibration Flight RAF | 76 Wg Cal Flt |
| QM | No. 42 Squadron RAF | 42 Sqn |
| QM | No. 254 Squadron RAF | 254 Sqn |
| QM | No. 276 Squadron RAF | 276 Sqn |
| QN | No. 5 Squadron RAF | 5 Sqn |
| QN | No. 214 Squadron RAF | 214 Sqn |
| QN | No. 28 Operational Training Unit RAF | 28 OTU |
| QO | No. 3 Squadron RAF | 3 Sqn |
| QO | No. 167 Squadron RAF | 167 Sqn |
| QO | No. 432 Squadron RCAF | 432 Sqn RCAF (sometimes 432 (RCAF) Sqn) |
| QP | Station Flight RAF Kirmington | |
| QQ | No. 83 Squadron RAF | 83 Sqn |
| QQ | No. 1662 Conversion Unit RAF | 1662 CU |
| QR | No. 61 Squadron RAF | 61 Sqn |
| QR | No. 223 Squadron RAF | 223 Sqn |
| QS | No. 192 Squadron RAF | 192 Sqn |
| QS | No. 620 Squadron RAF | 620 Sqn |
| QT | No. 57 Squadron RAF | 57 Sqn |
| QT | No. 67 Squadron RAF | 67 Sqn |
| QT | No. 142 Squadron RAF | 142 Sqn |
| QU | No. 326 (French) Squadron RAF | 326 French Sqn |
| QU | Royal Air Force Northern Ireland Communication Flight RAF | RAF NI Comm Flt |
| QU | Headquarters Royal Air Force Northern Ireland Communication Flight RAF | HQ RAF NI Comm Flt |
| QV | No. 19 Squadron RAF | 19 Sqn |
| QW | No. 1516 Flight RAF | 1516 Flt |
| QX | No. 50 Squadron RAF | 50 Sqn |
| QX | No. 224 Squadron RAF | 224 Sqn |
| QX | Coastal Command Communication Flight RAF | Coastal Cmd Comm Flt |
| QY | No. 254 Squadron RAF | 254 Sqn |
| QY | No. 262 Squadron RAF | 262 Sqn |
| QY | No. 452 Squadron RAAF (1943–45) | 452 Sqn RAAF, in SW Pacific. |
| QY | No. 1666 Conversion Unit RAF | 1666 CU |
| QZ | No. 643 Squadron RAF | 643Sqn (not formed) |
| QZ | No. 4 Operational Training Unit RAF | 4 OTU |
| Q3 | No. 613 Squadron RAF | 613 Sqn |
| Q6 | No. 1384 Conversion Unit RAF | 1384 CU |
| Q7 | No. 29 Maintenance Unit RAF | 29 MU |
| R | No. 205 Advanced Flying School RAF | 205 AFS |
| R | Central Flying School | CFS |
| R | No. 2 Flying Training School RAF | 2 FTS |
| R | No. 3 Flying Training School RAF | 3 FTS |
| R | No. 22 Flying Training School RAF | 22 FTS |
| R | No. 22 Service Flying Training School RAF | 22 SFTS |
| RA | No. 100 Squadron RAF | 100 Sqn |
| RA | No. 410 Squadron RCAF | 410 Sqn RCAF (sometimes 410 (RCAF) Sqn) |
| RAA | No. 500 Squadron RAF | 500 Sqn |
| RAB | No. 501 Squadron RAF | 501 Sqn |
| RAC | No. 502 Squadron RAF | 502 Sqn |
| RAD | No. 504 Squadron RAF | 504 Sqn |
| RAG | No. 600 Squadron RAF | 600 Sqn |
| RAH | No. 601 Squadron RAF | 601 Sqn |
| RAI | No. 602 Squadron RAF | 602 Sqn |
| RAJ | No. 603 Squadron RAF | 603 Sqn |
| RAK | No. 604 Squadron RAF | 604 Sqn |
| RAL | No. 605 Squadron RAF | 605 Sqn |
| RAN | No. 607 Squadron RAF | 607 Sqn |
| RAO | No. 608 Squadron RAF | 608 Sqn |
| RAP | No. 609 Squadron RAF | 609 Sqn |
| RAQ | No. 610 Squadron RAF | 610 Sqn |
| RAR | No. 611 Squadron RAF | 611 Sqn |
| RAS | No. 612 Squadron RAF | 612 Sqn |
| RAT | No. 613 Squadron RAF | 613 Sqn |
| RAU | No. 614 Squadron RAF | 614 Sqn |
| RAV | No. 615 Squadron RAF | 615 Sqn |
| RAW | No. 616 Squadron RAF | 616 Sqn |
| RB | No. 66 Squadron RAF | 66 Sqn |
| RB | No. 10 Squadron RAAF | 10 Sqn RAAF (sometimes 10 RAAF Sqn) |
| RC | No. 5 Lancaster Finishing School RAF | 5 LFS |
| RCA | Reserve Command Communication Squadron RAF | Res Cmd Comm Sqn. |
| RCB | No. 12 Reserve Flying School RAF | 12 RFS |
| RCC | No. 13 Reserve Flying School RAF | 13 RFS |
| RCD | No. 12 Reserve Flying School RAF | 12 RFS |
| RCD | No. 15 Reserve Flying School RAF | 15 RFS |
| RCE | No. 61 Group Communication Flight RAF | 61 Grp Comm Flt |
| RCF | No. 62 Group Communication Flight RAF | 62 Grp Comm Flt |
| RCG | No. 63 Group Communication Flight RAF | 63 Grp Comm Flt |
| RCH | No. 64 Group Communication Flight RAF | 64 Grp Comm Flt |
| RCI | No. 66 Group Communication Flight RAF | 66 Grp Comm Flt |
| RCJ | No. 17 Reserve Flying School RAF | 17 RFS |
| RCK | No. 3 Reserve Flying School RAF | 3 RFS |
| RCL | No. 14 Reserve Flying School RAF | 14 RFS |
| RCM | No. 1 Reserve Flying School RAF | 1 RFS |
| RCN | No. 4 Reserve Flying School RAF | 4 RFS |
| RCO | No. 6 Reserve Flying School RAF | 6 RFS |
| RCP | No. 7 Reserve Flying School RAF | 7 RFS |
| RCQ | No. 8 Reserve Flying School RAF | 8 RFS |
| RCR | No. 11 Reserve Flying School RAF | 11 RFS |
| RCS | No. 16 Reserve Flying School RAF | 16 RFS |
| RCT | No. 18 Reserve Flying School RAF | 18 RFS |
| RCU | No. 22 Reserve Flying School RAF | 22 RFS |
| RCV | No. 24 Reserve Flying School RAF | 24 RFS |
| RCW | No. 25 Reserve Flying School RAF | 25 RFS |
| RCX | No. 2 Reserve Flying School RAF | 2 RFS |
| RCY | No. 5 Reserve Flying School RAF | 5 RFS |
| RCZ | No. 9 Reserve Flying School RAF | 9 RFS |
| RD | No. 67 Squadron RAF | 67 Sqn |
| RE | No. 118 Squadron RCAF | 118 Sqn RCAF* (1940–42) |
| RE | No. 229 Squadron RAF | 229 Sqn |
| RE | Central Fighter Establishment RAF | CFE |
| RF | No. 204 Squadron RAF | 204 Sqn |
| RF | No. 303 (Polish) Squadron RAF | 303 Polish Sqn (1940–45) |
| RF | No. 1510 Flight RAF | 1510 Flt |
| RG | No. 208 Squadron RAF | 208 Sqn |
| RG | No. 510 Squadron RAF | 510 Sqn |
| RG | No. 1472 Flight RAF | 1472 Flt |
| RG | Station Flight RAF Earls Colne | |
| RH | No. 88 Squadron RAF | 88 Sqn |
| RH | No. 179 Squadron RAF | 179 Sqn |
| RJ | No. 46 Squadron RAF | 46 Sqn |
| RJ | Station Flight RAF Thornaby | |
| RK | No. 131 Squadron RAF | 131 Sqn |
| RL | No. 38 Squadron RAF | 38 Sqn |
| RL | No. 279 Squadron RAF | 279 Sqn |
| RL | No. 603 Squadron RAF | 603 Sqn |
| RM | No. 26 Squadron RAF | 26 Sqn |
| RM | No. 140 Squadron RAF | 140 Sqn |
| RN | No. 72 Squadron RAF | 82 Sqn |
| RN | No. 93 Squadron RAF | 93 Sqn |
| RO | No. 29 Squadron RAF | 29 Sqn |
| RO | No. 174 Squadron RAF | 174 Sqn |
| RO | No. 32 Operational Training Unit RAF | 32 OTU |
| ROA | No. 661 Squadron RAF | 661 Sqn |
| ROA | No. 1957 Flight RAF | 1957 Flt |
| ROA | No. 1958 Flight RAF | 1958 Flt |
| ROA | No. 1959 Flight RAF | 1959 Flt |
| ROA | No. 1960 Flight RAF | 1960 Flt |
| ROA | No. 1961 Flight RAF | 1961 Flt |
| ROB | No. 662 Squadron RAF | 662 Sqn |
| ROB | No. 1956 Flight RAF | 1956 Flt |
| ROB | No. 1962 Flight RAF | 1962 Flt |
| ROB | No. 1963 Flight RAF | 1963 Flt |
| ROC | No. 663 (Polish Second Corps AOP) Squadron RAF | 663 Sqn Polish AOP |
| ROC | No. 1951 Flight RAF | 1951 Flt |
| ROC | No. 1952 Flight RAF | 1952 Flt |
| ROC | No. 1953 Flight RAF | 1953 Flt |
| ROC | No. 1954 Flight RAF | 1954 Flt |
| ROC | No. 1955 Flight RAF | 1955 Flt |
| ROD | No. 664 Squadron RAF | 664 Sqn |
| ROD | No. 1964 Flight RAF | 1964 Flt |
| ROD | No. 1965 Flight RAF | 1965 Flt |
| ROD | No. 1969 Flight RAF | 1969 Flt |
| ROD | No. 1970 Flight RAF | 1970 Flt |
| ROG | No. 666 Squadron RAF | 666 Sqn |
| ROG | No. 1966 Flight RAF | 1966 Flt |
| ROG | No. 1967 Flight RAF | 1967 Flt |
| ROG | No. 1968 Flight RAF | 1968 Flt |
| RP | No. 288 Squadron RAF | 288 Sqn |
| RQ | No. 193 Squadron RAF | 193 Sqn |
| RQ | Station Flight RAF Colerne | |
| RR | No. 407 Squadron RCAF | 407 Sqn RCAF (sometimes 407 (RCAF) Sqn) |
| RR | No. 615 Squadron RAF | 615 Sqn |
| RR | Station Flight RAF Filton | |
| RS | No. 229 Operational Conversion Unit RAF | 229 OCU |
| RS | No. 30 Squadron RAF | 30 Sqn |
| RS | No. 157 Squadron RAF | 157 Sqn |
| RS | No. 171 Squadron RAF | 171 Sqn |
| RSA | No. 23 Reserve Flying School RAF | 23 RFS |
| RSB | No. 10 Reserve Flying School RAF | 10 RFS |
| RT | No. 112 Squadron RAF | 112 Sqn |
| RT | No. 114 Squadron RAF | 114 Sqn |
| RT | No. 147 Squadron RAF | 147 Sqn |
| RU | Station Flight RAF Hendon | |
| RU | No. 414 Squadron RCAF | 414 Sqn RCAF (sometimes 414 (RCAF) Sqn) |
| RUA | Aberdeen University Air Squadron | Aber UAS |
| RUB | Birmingham University Air Squadron | Birm UAS |
| RUC | Cambridge University Air Squadron | Camb UAS |
| RUD | Durham University Air Squadron | Dur UAS |
| RUE | Edinburgh University Air Squadron | Edin UAS |
| RUG | Glasgow University Air Squadron | Glas UAS |
| RUL | London University Air Squadron | Lond UAS |
| RUL | University of London Air Squadron | U o LAS |
| RUM | Manchester University Air Squadron | Man UAS |
| RUN | Nottingham University Air Squadron | Nott UAS |
| RUO | Oxford University Air Squadron | Oxf UAS |
| RUQ | Queens University Air Squadron | Qu UAS |
| RUS | St. Andrews University Air Squadron | St And UAS |
| RUY | Leeds University Air Squadron | Leeds UAS |
| RUZ | Southampton University Air Squadron | Soton UAS |
| RV | No. 1659 Conversion Unit RAF | 1659 CU |
| RW | No. 36 Squadron RAF | 36 Sqn |
| RX | No. 25 Squadron RAF | 25 Sqn |
| RX | No. 456 Squadron RAAF | 456 Sqn RAAF (sometimes 456 RAAF Sqn) |
| RY | No. 278 Squadron RAF | 278 Sqn |
| RY | No. 313 (Czech) Squadron RAF | 313 Czech Sqn |
| RZ | No. 513 Squadron RAF | 513 Sqn |
| RZ | No. 241 Squadron RAF | 241 Sqn |
| R1 | 'R' Flight, No. 1 Anti-Aircraft Co-operation Unit RAF | 'R' Flt, 1 AACU |
| R2 | Pilotless Aircraft Unit RAF | PAU |
| R4 | No. 18 Armament Practice Camp RAF | 18 APC |
| R4 | No. 1 Armament Practice Station RAF | 1 APS |
| R8 | No. 274 Maintenance Unit RAF | 274 MU |
| S | No. 78 Squadron RAF | 88 Sqn |
| S | No. 208 Squadron RAF | 208 Sqn |
| S | No. 207 Advanced Flying School RAF | 207 AFS |
| S | No. 1564 Flight RAF | 1564 Flt |
| S | Central Flying School | CFS |
| S | Royal Air Force Technical College | RAFTC |
| S | No. 3 Flying Training School RAF | 3 FTS |
| S | No. 8 Flying Training School RAF | 8 FTS |
| S | No. 8 (Advanced) Flying Training School RAF | 8 (A) FTS |
| SA | No. 486 Squadron RNZAF | 486 (RNZAF) Sqn 486 Sqn RNZAF (sometimes |
| SB | No. 464 Squadron RAAF | 464 RAAF (sometimes 464 RAAF Sqn) |
| SC | Station Flight RAF Prestwick | |
| SD | No. 72 Squadron RAF | 82 Sqn |
| SD | No. 501 Squadron RAF | 501 Sqn |
| SE | No. 95 Squadron RAF | 94 Sqn |
| SE | No. 431 Squadron RCAF | 431 Sqn RCAF (sometimes 431 (RCAF) Sqn) |
| SF | No. 39 Squadron RAF | 39 Sqn |
| SF | No. 137 Squadron RAF | 137 Sqn |
| SG | No. 626 Squadron RAF | 626 Sqn |
| SH | No. 64 Squadron RAF | 64 Sqn |
| SH | No. 216 Squadron RAF | 216 Sqn |
| SH | No. 240 Squadron RAF | 240 Sqn |
| SJ | No. 96 Squadron RAF | 96 Sqn |
| SJ | No. 21 Operational Training Unit RAF | 21 OTU |
| SK | No. 165 Squadron RAF | 165 Sqn |
| SK | No. 263 Squadron RAF | 263 Sqn |
| SL | No. 13 Operational Training Unit RAF | 13 OTU |
| SM | No. 272 Squadron RAF | 272 Sqn |
| SM | No. 305 (Polish) Squadron RAF | 305 Sqn |
| SN | No. 243 Squadron RAF | 243 Sqn |
| SN | No. 511 Squadron RAF | 511 Sqn |
| SN | No. 230 Operational Conversion Unit RAF | 230 OCU |
| SO | No. 33 Squadron RAF | 33 Sqn |
| SO | No. 145 Squadron RAF | 145 Sqn |
| SP | No. 320 Squadron RAF | 320 Dutch Sqn |
| SP | No. 110 Squadron RCAF | 110 Sqn RCAF* |
| SP | No. 400 Squadron RCAF | 400 Sqn RCAF (sometimes 400 (RCAF) Sqn) |
| SP | Station Flight RAF Prestwick | |
| SQ | No. 500 Squadron RAF | 500 Sqn |
| SR | No. 101 Squadron RAF | 101 Sqn |
| SR | No. 281 Squadron RAF | 281 Sqn |
| SS | No. 129 Squadron RAF | 129 Sqn |
| SS | No. 1552 Flight RAF | 1552 Flt |
| ST | No. 228 Operational Conversion Unit RAF | 228 OCU |
| ST | No. 54 Operational Training Unit RAF | 54 OTU |
| SU | No. 235 Squadron RAF | 235 Sqn |
| SU | Station Flight RAF Prestwick | |
| SV | No. 218 Squadron RAF | 218 Sqn |
| SV | No. 1663 Conversion Unit RAF | 1663 CU |
| SW | No. 1678 Flight RAF | 1678 Flt |
| SW | No. 43 Squadron RAF | 43 Sqn |
| SW | No. 253 Squadron RAF | 253 Sqn |
| SW | No. 517 Squadron RAF | 517 Sqn |
| SW | No. 1678 Conversion Unit RAF | 1678 CU |
| SW | No. 1678 Flight RAF | 1678 Flt |
| SX | No. 1 Coast Artillery Co-operation Unit/Flight RAF | 1 CACU/Flt |
| SX | Station Flight RAF Methwold | |
| SY | No. 139 Squadron RAF | 139 Sqn |
| SY | No. 613 Squadron RAF | 613 Sqn |
| SZ | No. 256 Squadron RAF | 256 Sqn |
| SZ | No. 316 (Polish) Squadron RAF | 316 Polish Sqn |
| S6 | No. 41 Group Communication Flight RAF | 41 Gp Comm Flt |
| S6 | Maintenance Command Communication Flight RAF | Maint Cmd Comm Flt |
| S7 | No. 500 Squadron RAF | 500 Sqn |
| S8 | No. 328 (French) Squadron RAF | 328 French Sqn |
| S9 | No. 16 Group Communication Flight RAF | 16 Gp Comm Flt |
| T | No. 15 Squadron RAF | 15 Sqn |
| T | No. 36 Squadron RAF | 36 Sqn |
| T | No. 74 Squadron RAF | 84 Sqn |
| T | No. 79 Squadron RAF | 89 Sqn |
| T | No. 112 Squadron RAF | 112 Sqn |
| T | No. 204 Squadron RAF | 204 Sqn |
| T | No. 220 Squadron RAF | 220 Sqn |
| T | No. 249 Squadron RAF | 249 Sqn |
| T | No. 256 Squadron RAF | 256 Sqn |
| T | No. 1 Coastal Patrol Flight RAF | 1 CP Flt |
| T | No. 1417 Flight RAF | 1417 Flt |
| T | No. 3 Flying Training School RAF | 3 FTS |
| T | No. 14 (Advanced) Flying Training School RAF | 4 (A)FTS |
| TA | 2 Squadron SAAF | 2 Sqn SAAF |
| TA | No. 358 Squadron RAF | 358 Sqn |
| TA | No. 235 Operational Conversion Unit RAF | 235 OCU |
| TA | No. 4 Operational Training Unit RAF | 4 OTU |
| TAL | Communication Flight Aldermaston RAF | |
| TB | No. 51 Squadron RAF | 51 Sqn |
| TB | No. 77 Squadron RAF | 77 Sqn |
| TB | No. 153 Squadron RAF | 153 Sqn |
| TB | No. 156 Squadron RAF | 156 Sqn |
| TBR | RAF Staff College Flight | RAF SC Flt |
| TC | No. 170 Squadron RAF | 170 Sqn |
| TCA | No. 1 Radio School RAF | 1 RS |
| TCE | Station Flight RAF Carew Cheriton | |
| TCN | Station Flight RAF Cranwell | |
| TCO | Station Flight RAF Cosford | |
| TCR | No. 1 Radio School RAF | 1 RS |
| TCW | Station Flight RAF Carew Cheriton | |
| TD | No. 132 Squadron RAF | 132 Sqn |
| TD | No. 320 (Dutch) Squadron RAF | 320 Dutch Sqn |
| TD | No. 453 Squadron RAAF (1941–42) | 453 Sqn RAAF (sometimes 453 RAAF Sqn); in Malaya/Singapore |
| TD | No. 82 Operational Training Unit RAF | 82 OTU |
| TDE | Empire Radio School RAF | ERS |
| TE | No. 53 Squadron RAF | 53 Sqn |
| TE | No. 1401 Flight RAF | 1401 Flt |
| TE | Station Flight RAF Carew Cheriton | |
| TF | No. 620 Squadron RAF | 620 Sqn |
| TF | No. 29 Operational Training Unit RAF | 29 OTU |
| TF | No. 127 Squadron RCAF | 127 Sqn RCAF* (1942–43) |
| TFA | School of Photography RAF | S of P |
| TH | No. 20 Squadron RAF | 20 Sqn |
| TH | No. 418 Squadron RCAF | 418 Sqn RCAF (sometimes 418 (RCAF) Sqn) |
| THA | Station Flight RAF Halton | |
| THE | Parachute Test Unit RAF | PTU |
| THI | Aeroplane & Armament Experimental Establishment | A& AEE |
| THL | No. 24 Group Communication Flight RAF | 24 Gp Comm Flt |
| THO | Station Flight RAF Hornchurch | |
| TIH | No. 1 RAF Film Unit | 1 RAF FU |
| TJ | 7 Squadron SAAF | 7 Sqn SAAF |
| TJ | No. 202 Squadron RAF | 202 Sqn |
| TJ | No. 272 Squadron RAF | 272 Sqn |
| TJ | No. 52 Operational Training Unit RAF | 52 OTU |
| TK | No. 143 Squadron RAF | 143 Sqn |
| TK | No. 149 Squadron RAF | 149 Sqn |
| TL | No. 35 Squadron RAF | 35 Sqn |
| TL | No. 253 Squadron RAF | 253 Sqn |
| TLO | Station Flight RAF Locking | |
| TM | No. 111 Squadron RCAF | 111 Sqn RCAF* |
| TM | No. 504 Squadron RAF | 504 Sqn |
| TMA | No. 4 Radio School RAF | 4 RS |
| TMD | No. 4 Radio School RAF | 4 RS |
| TME | No. 4 Radio School RAF | 4 RS |
| TML | No. 4 Radio School RAF | 4 RS |
| TN | No. 33 Squadron RAF | 33 Sqn |
| TN | No. 30 Operational Training Unit RAF | 30 OTU |
| TO | No. 228 Squadron RAF | 228 Sqn |
| TO | No. 61 Operational Training Unit RAF | 61 OTU |
| TO | No. 203 Advanced Flying School RAF | 203 AFS |
| TO | No. 226 Operational Conversion Unit RAF | 226 OCU |
| TO | No. 228 Operational Conversion Unit RAF | 228 OCU |
| TOC | Officers Advanced Training School RAF | OATS |
| TP | No. 73 Squadron RAF | 83 Sqn |
| TP | No. 198 Squadron RAF | 198 Sqn |
| TP | No. 277 Squadron RAF | 277 Sqn |
| TR | No. 59 Squadron RAF | 59 Sqn |
| TR | No. 238 Squadron RAF | 238 Sqn |
| TQ | No. 102 Squadron RAF | 102 Sqn |
| TQ | No. 202 Squadron RAF | 202 Sqn |
| TQ | Station Flight RAF Bramcote | |
| TS | No. 137 Squadron RAF | 137 Sqn |
| TS | No. 548 Squadron RAF | 548 Sqn |
| TS | No. 657 Squadron RAF | 657 Sqn |
| TS | No. 1900 Flight RAF | 1900 Flt |
| TS | No. 1901 Flight RAF | 1901 Flt |
| TSA | Station Flight RAF St Athan | |
| TSI | RAF (Belgian) Training School RAF | RAF (Bel) TS |
| TSM | No. 4 Radio School RAF | 4 RS |
| TSN | RAF (Belgian) Training School RAF | RAF (Bel) TS |
| TSO | No. 27 Group Communication Flight RAF | 27 Gp Comm Flt |
| TT | No. 289 Squadron RAF | 289 Sqn |
| TT | No. 1658 Conversion Unit RAF | 1658 CU |
| TTE | No. 22 Group Communication Flight RAF | 22 Gp Comm Flt |
| TU | Station Flight RAF Dyce | |
| TU | No. 1 Torpedo Unit RAF | 1 TU |
| TV | No. 4 Squadron RAF | 4 Sqn |
| TV | No. 151 Squadron RAF | 151 Sqn |
| TV | No. 173 Squadron RAF | 173 Sqn |
| TV | No. 1660 Conversion Unit RAF | 1660 CU |
| TW | No. 90 Squadron RAF | 90 Sqn |
| TW | No. 141 Squadron RAF | 141 Sqn |
| TWM | School of Photography RAF | S of Phot |
| TWY | Technical Training Command Communication Flight RAF | TT Cmd Comm Flt |
| TX | No. 130 Squadron RAF | 130 Sqn |
| TX | No. 11 Operational Training Unit RAF | 11 OTU |
| TY | No. 24 Operational Training Unit RAF | 24 OTU |
| T2 | No. 46 Maintenance Unit RAF | 46 MU |
| T5 | Station Flight RAF Abingdon | |
| T6 | Station Flight RAF Melbourne | |
| T7 | No. 650 Squadron RAF | 650 Sqn |

### U-Z

| Squadron code | Unit | Unit shorthand |
| U | No. 8 Flying Training School RAF | 8 FTS |
| U | No. 8 (Advanced) Flying Training School RAF | 8 (A)FTS |
| U | No. 22 Flying Training School RAF | 22 FTS |
| U | No. 22 Service Flying Training School RAF | 22 SFTS |
| UA | No. 269 Squadron RAF | 269 Sqn |
| UB | No. 63 Squadron RAF | 63 Sqn |
| UB | No. 164 Squadron RAF | 164 Sqn |
| UB | No. 304 (Polish) Squadron RAF | 304 Polish Sqn |
| UB | No. 455 Squadron RAAF | 455 Sqn RAAF (sometimes 455 RAAF Sqn) |
| UD | No. 141 Squadron RAF | 141 Sqn |
| UD | No. 452 Squadron RAAF (1941–42) | 452 Sqn RAAF (sometimes 452 RAAF Sqn), in UK. |
| UE | No. 200 Squadron RAF | 200 Sqn |
| UE | No. 228 Squadron RAF | 228 Sqn |
| UF | No. 601 Squadron RAF | 601 Sqn |
| UF | No. 622 Squadron RAF | 622 Sqn |
| UF | No. 24 Operational Training Unit RAF | 24 OTU |
| UG | No. 16 Squadron RAF | 16 Sqn |
| UG | No. 310 (Czech) Squadron RAF | 310 Czech Sqn |
| UG | No. 1654 Conversion Unit RAF | 1654 CU |
| UH | No. 21 Operational Training Unit RAF | 21 OTU |
| UH | No. 1682 Flight RAF | 1682 Flt |
| UJ | No. 27 Operational Training Unit RAF | 27 OTU |
| UK | No. 637 Squadron RAF | 637 Sqn (not formed) |
| UL | No. 178 Squadron RAF | 178 Sqn |
| UL | No. 576 Squadron RAF | 576 Sqn |
| UL | No. 608 Squadron RAF | 608 Sqn |
| UM | No. 152 Squadron RAF | 152 Sqn |
| UM | No. 626 Squadron RAF | 626 Sqn |
| UN | No. 126 Squadron RAF | 126 Sqn |
| UN | Station Flight RAF Faldingworth | |
| UO | No. 266 Squadron RAF | 266 Sqn |
| UO | No. 19 Operational Training Unit RAF | 19 OTU |
| UP | No. 605 Squadron RAF | 605 Sqn |
| UP | No. 4 Squadron RAF | 4 Sqn |
| UP | No. 222 Squadron RAF | 222 Sqn |
| UQ | No. 211 Squadron RAF | 211 Sqn |
| UQ | No. 512 Squadron RAF | 512 Sqn |
| UQ | No. 1508 Flight RAF | 1508 Flt |
| UR | No. 84 Squadron RAF | 84 Sqn |
| UR | No. 13 Operational Training Unit RAF | 13 OTU |
| US | No. 28 Squadron RAF | 28 Sqn |
| US | No. 56 Squadron RAF | 56 Sqn |
| UV | No. 8 Squadron RAAF (1941–42) | 8 Sqn RAAF (sometimes 8 RAAF Sqn); Malaya, Singapore & Java. |
| UT | No. 17 Squadron RAF | 17 Sqn |
| UT | No. 51 Squadron RAF | 51 Sqn |
| UT | No. 461 Squadron RAAF | 461 Sqn RAAF (sometimes 461 RAAF Sqn) |
| UU | No. 61 Operational Training Unit RAF | 61 OTU |
| UU | No. 226 Operational Conversion Unit RAF | 226 OCU |
| UV | No. 17 Squadron RAF | 17 Sqn |
| UV | No. 460 Squadron RAAF | 460 Sqn RAAF (sometimes 460 RAAF Sqn) |
| UW | No. 3 Tactical Exercise Unit RAF | 3 TEU |
| UW | No. 55 Operational Training Unit RAF | 55 OTU |
| UX | No. 82 Squadron RAF | 82 Sqn |
| UX | No. 214 Squadron RAF | 214 Sqn |
| UX | No. 1476 Flight RAF | 1476 Flt |
| UX | Central Fighter Establishment | CFE |
| UY | No. 314 Squadron RAF | 314 Sqn (not formed as a flying unit) |
| UY | No. 10 Operational Training Unit RAF | 10 OTU |
| UZ | No. 292 Squadron RAF | 292 Sqn |
| UZ | No. 306 (Polish) Squadron RAF | 306 Polish Sqn |
| U2 | Station Flight RAF Talbenny | |
| U3 | Radio Warfare Establishment RAF | RWE |
| U4 | No. 667 Squadron RAF | 667 Sqn |
| U5 | No. 3 Ferry Pool RAF | 3 FP |
| U5 | No. 51 Maintenance Unit RAF | 51 MU |
| U6 | No. 436 Squadron RCAF | 436 Sqn RCAF (sometimes 436 (RCAF) Sqn) |
| U7 | No. 1697 Flight RAF | 1697 Flt |
| V | No. 126 Squadron RAF | 126 Sqn |
| V | No. 1435 Flight RAF | 1435 Flt |
| V | No. 1435 Squadron RAF | 1435 Sqn |
| VA | No. 84 Squadron RAF | 84 Sqn |
| VA | No. 125 Squadron RAF | 125 Sqn |
| VA | No. 264 Squadron RAF | 264 Sqn |
| VA | No. 282 Squadron RAF | 282 Sqn |
| VB | No. 221 Squadron RAF | 221 Sqn |
| VB | No. 334 (Norway) Squadron RAF | 334 Norwegian Sqn |
| VB | No. 14 Operational Training Unit RAF | 14 OTU |
| VD | Central Gunnery School RAF | CGS |
| VD | No. 123 Squadron RCAF | 123 Sqn RCAF* |
| VE | No. 110 Squadron RAF | 110 Sqn |
| VE | No. 319 Squadron RAF | 319 Sqn (not formed) |
| VE | Station Flight RAF Kirton-in-Lindsey | |
| VF | Station Flight RAF Lindholme | |
| VF | No. 99 Squadron RAF | 99 Sqn |
| VG | No. 210 Squadron RAF | 210 Sqn |
| VG | No. 285 Squadron RAF | 285 Sqn |
| VI | No. 169 Squadron RAF | 169 Sqn |
| VJ | No. 503 Squadron RAF | 503 Sqn |
| VK | No. 238 Squadron RAF | 238 Sqn |
| VK | No. 307 Polish Night Fighter Squadron | 307 Polish Sqn |
| VK | No. 85 Group Communication Flight RAF | 85 Gp Comm Flt |
| VL | 12 Squadron SAAF | 12 Sqn SAAF |
| VL | No. 167 Squadron RAF | 167 Sqn |
| VL | No. 322 (Dutch) Squadron RAF | 322 Dutch Sqn |
| VM | No. 231 Squadron RAF | 231 Sqn |
| VM | No. 244 Squadron RAF | 244 Sqn |
| VM | No. 1561 Flight RAF | 1561 Flt |
| VN | No. 50 Squadron RAF | 50 Sqn |
| VN | No. 333 (Norway) Squadron RAF | 333 Norwegian Sqn |
| VO | No. 98 Squadron RAF | 98 Sqn |
| VP | No. 259 Squadron RAF | 259 Sqn |
| VP | Station Flight RAF Exeter | |
| VQ | No. 201 Squadron RAF | 201 Sqn |
| VQ | No. 18 Operational Training Unit RAF | 18 OTU |
| VR | No. 22 Squadron RAF | 22 Sqn |
| VR | No. 419 Squadron RCAF | 419 Sqn RCAF (sometimes 419 (RCAF) Sqn) |
| VS | No. 31 Squadron RAF | 31 Sqn |
| VS | Metropolitan Communication Squadron RAF | MC Sqn |
| VT | No. 30 Squadron RAF | 30 Sqn |
| VT | No. 216 Squadron RAF | 216 Sqn |
| VT | No. 1556 Flight RAF | 1556 Flt |
| VU | No. 36 Squadron RAF | 36 Sqn |
| VU | No. 246 Squadron RAF | 246 Sqn |
| VV | No. 288 Squadron RAF | 288 Sqn |
| VV | Station Flight RAF Sumburgh | |
| VW | Station Flight RAF Chedburgh | |
| VW | No. 157 Squadron RAF | 157 Sqn |
| VW | No. 118 Squadron RCAF | 118 Sqn (1943) |
| VX | No. 206 Squadron RAF | 206 Sqn |
| VY | No. 85 Squadron RAF | 85 Sqn |
| VY | No. 249 Squadron RAF | 249 Sqn |
| VZ | No. 412 Squadron RCAF | 412 Sqn RCAF (sometimes 412 (RCAF) Sqn) |
| VZ | No. 636 Squadron RAF | 636 Sqn (not formed) |
| V4 | No. 6 Maintenance Unit RAF | 6 MU |
| V6 | No. 615 Squadron RAF | 615 Sqn |
| V6 | Radio Warfare Establishment RAF | RWE |
| V7 | Central Signals Establishment RAF | CSE |
| V8 | No. 570 Squadron RAF | 570 Sqn |
| V9 | No. 502 Squadron RAF | 502 Sqn |
| W | No. 234 Squadron RAF | 234 Sqn |
| W | No. 205 Advanced Flying School RAF | 205 AFS |
| W | No. 3 Air Navigation School RAF | 3 ANS |
| W | Central Flying School | CFS |
| W | No. 4 Flying Training School RAF | 4 FTS |
| W | No. 5 Flying Training School RAF | 5 FTS |
| W | No. 8 Flying Training School RAF | 8 FTS |
| W | No. 8 (Advanced) Flying Training School RAF | 8 (A)FTS |
| WA | No. 264 Squadron RAF | 264 Sqn |
| WB | No. 181 Squadron RAF | 181 Sqn |
| WB | Bomber Command Instructors School RAF | BCIS |
| WB | Bomber Command Instrument Rating and Examining Flight RAF | BCIR&E Flt |
| WC | No. 309 (Polish) Squadron RAF | 309 Polish Sqn |
| WD | No. 206 Squadron RAF | 206 Sqn |
| WD | Station Flight RAF Leeming | |
| WE | No. 59 Squadron RAF | 59 Sqn |
| WE | No. 23 Operational Training Unit RAF | 23 OTU |
| WF | No. 238 Squadron RAF | 238 Sqn |
| WF | No. 525 Squadron RAF | 525 Sqn |
| WG | No. 128 Squadron RAF | 128 Sqn |
| WG | No. 26 Operational Training Unit RAF | 26 OTU |
| WH | No. 330 (Norway) Squadron RAF | 330 Norwegian Sqn |
| WH | Armament Practice Station Acklington | APS Acklington |
| WI | No. 69 Squadron RAF | 69 Sqn |
| WJ | No. 167 Squadron RAF | 167 Sqn |
| WJ | No. 17 Operational Training Unit RAF | 17 OTU |
| WK | No. 81 Squadron RAF | 81 Sqn |
| WK | No. 135 Squadron RAF | 135 Sqn |
| WK | No. 1310 Flight RAF | 1310 Flt |
| WK | No. 1316 Flight RAF | 1316 Flt |
| WL | No. 434 Squadron RCAF | 434 Sqn RCAF (sometimes 434 (RCAF) Sqn) |
| WL | No. 612 Squadron RAF | 612 Sqn |
| WL | Station Flight RAF Leeming | |
| WM | No. 68 Squadron RAF | 68 Sqn |
| WM | No. 122 Squadron RAF | 122 Sqn |
| WN | No. 527 Squadron RAF | 527 Sqn |
| WO | No. 138 Squadron RAF | 138 Sqn |
| WP | No. 90 Squadron RAF | 90 Sqn |
| WQ | No. 209 Squadron RAF | 209 Sqn |
| WQ | No. 604 Squadron RAF | 604 Sqn |
| WQ | No. 12 Group Communication Flight RAF | 12 Gp Comm Flt |
| WR | No. 248 Squadron RAF | 248 Sqn |
| WR | Station Flight RAF Moreton-in-the-Marsh | |
| WR | 40 Squadron SAAF | 40 Sqn SAAF |
| WS | No. 9 Squadron RAF | 9 Sqn |
| WS | No. 275 Squadron RAF | 275 Sqn |
| WT | No. 35 Squadron RAF | 35 Sqn |
| WT | Station Flight RAF Stornoway | |
| WU | No. 225 Squadron RAF | 225 Sqn |
| WU | No. 317 (Polish) Squadron RAF | 317 Polish Sqn |
| WV | No. 18 Squadron RAF | 18 Sqn |
| WW | No. 332 (Norway) Squadron RAF | 332 Norwegian Sqn |
| WX | No. 302 (Polish) Squadron RAF | 302 Polish Sqn (1940–45) |
| WX | No. 627 Squadron RAF | 627 Sqn |
| WY | No. 541 Squadron RAF | 541 Sqn |
| WY | No. 261 Squadron RAF | 261 Sqn |
| WY | No. 28 Operational Training Unit RAF | 28 OTU |
| WZ | No. 19 Squadron RAF | 19 Sqn |
| WZ | Station Flight RAF Graveley | |
| W2 | No. 80 Squadron RAF | 80 Sqn |
| W3 | Station Flight RAF Hemswell | |
| W4 | Glider Pick-up Training Flight RAF | GPTF |
| W5 | Station Flight RAF Castle Camps | |
| W6 | No. 18 Maintenance Unit RAF | 18 MU |
| X | No. 229 Squadron RAF | 229 Sqn |
| X | No. 603 Squadron RAF | 603 Sqn |
| X | No. 203 Advanced Flying School RAF | 203 AFS |
| X | No. 205 Advanced Flying School RAF | 205 AFS |
| X | No. 3 Air Navigation School RAF | 3 ANS |
| X | Central Flying School | CFS |
| X | No. 2 Flying Training School RAF | 2 FTS |
| X | No. 4 Flying Training School RAF | 4 FTS |
| X | No. 5 Flying Training School RAF | 5 FTS |
| X | No. 6 Flying Training School RAF | 6 FTS |
| X | No. 8 Flying Training School RAF | 8 FTS |
| X | No. 8 (Advanced) Flying Training School | 8 (A)FTS |
| XA | No. 489 Squadron RAF | 489 Sqn |
| XA | No. 640 Squadron RAF | 640 Sqn |
| XA | Essex Sector Communication Flight RAF | ES Comm Flt |
| XB | No. 224 Squadron RAF | 224 Sqn |
| XB | No. 239 Squadron RAF | 239 Sqn |
| XB | No. 2 Tactical Exercise Unit RAF | 2 TEU |
| XC | No. 26 Squadron RAF | 26 Sqn |
| XD | No. 139 Squadron RAF | 139 Sqn |
| XD | No. 188 Squadron RAF | 188 Sqn |
| XD | No. 13 Operational Training Unit RAF | 13 OTU |
| XE | No. 6 Squadron RAF | 6 Sqn |
| XE | Central Bomber Establishment RAF | CBE |
| XF | No. 168 Squadron RAF | 168 Sqn |
| XF | No. 19 Operational Training Unit RAF | 19 OTU |
| XG | No. 16 Operational Training Unit RAF | 16 OTU |
| XH | No. 218 Squadron RAF | 218 Sqn |
| XH | No. 296 Squadron RAF | 296 Sqn |
| XJ | No. 293 Squadron RAF | 293 Sqn |
| XJ | No. 13 Operational Training Unit RAF | 13 OTU |
| XK | No. 46 Squadron RAF | 46 Sqn |
| XK | No. 272 Squadron RAF | 272 Sqn |
| XL | No. 346 (French) Squadron RAF | 346 French Sqn |
| XL | No. 20 Operational Training Unit RAF | 20 OTU |
| XL | No. 226 Operational Conversion Unit RAF | 226 OCU |
| XL | No. 1335 Conversion Unit RAF | 1335 CU |
| XM | No. 182 Squadron RAF | 182 Sqn |
| XM | No. 1902 Flight RAF | 1902 Flt |
| XM | No. 1903 Flight RAF | 1903 Flt |
| XM | No. 1904 Flight RAF | 1904 Flt |
| XM | No. 1905 Flight RAF | 1905 Flt |
| XM | No. 1908 Flight RAF | 1908 Flt |
| XM | No. 1909 Flight RAF | 1909 Flt |
| XM | No. 652 Squadron RAF | 652 Sqn |
| XN | No. 232 Squadron RAF | 232 Sqn |
| XN | No. 22 Operational Training Unit RAF | 22 OTU |
| XO | No. 57 Operational Training Unit RAF | 57 OTU |
| XO | No. 112 Squadron RAF | 112 Sqn |
| XP | No. 174 Squadron RAF | 174 Sqn |
| XP | No. 318 (Polish) Squadron RAF | 318 Polish Sqn |
| XP | No. 457 Squadron RAAF (1943) | 457 Sqn RAAF, in SW Pacific. |
| XQ | No. 64 Squadron RAF | 64 Sqn |
| XQ | No. 86 Squadron RAF | 86 Sqn |
| XR | No. 71 Squadron RAF | 71 Sqn |
| XR | No. 2 Group Communication Flight RAF | 2 Gp Comm Flt |
| XS | No. 106 Squadron RAF | 106 Sqn |
| XT | No. 335 (Greek) Squadron RAF | 335 Greek Sqn |
| XT | No. 603 Squadron RAF | 603 Sqn |
| XT | No. 1657 Conversion Unit RAF | 1657 CU |
| XU | No. 7 Squadron RAF | 8 Sqn |
| XU | No. 49 Squadron RAF | 49 Sqn |
| XV | No. 2 Squadron RAF | 2 Sqn |
| XV | No. 309 (Polish) Squadron RAF | 309 Polish Sqn |
| XW | No. 18 Operational Training Unit RAF | 18 OTU |
| XX | No. 631 Squadron RAF | 631 Sqn |
| XY | No. 90 Squadron RAF | 90 Sqn |
| XY | No. 136 Squadron RAF | 136 Sqn |
| XY | No. 186 Squadron RAF | 186 Sqn |
| XY | No. 203 Advanced Flying School RAF | 203 AFS |
| XZ | No. 39 Squadron RAF | 39 Sqn |
| XZ | No. 153 Squadron RAF | 153 Sqn |
| X2 | Station Flight RAF Stoney Cross | |
| X3 | No. 111 Operational Training Unit RAF | 111 OTU |
| X6 | No. 290 Squadron RAF | 290 Sqn |
| X8 | No. 6 Group Communication Flight RAF | 6 Gp Comm Flt |
| X9 | No. 299 Squadron RAF | 299 Sqn |
| Y | No. 205 Advanced Flying School RAF | 205 AFS |
| Y | No. 206 Advanced Flying School RAF | 206 AFS |
| Y | No. 1 Flying Training School RAF | 1 FTS |
| Y | No. 22 Flying Training School RAF | 22 FTS |
| Y | No. 22 Service Flying Training School RAF | 22 SFTS |
| YA | No. 68 Squadron RAF | 68 Sqn |
| YA | Station Flight RAF Netheravon | |
| YA | No. 14 Squadron RCAF | 14 Sqn RCAF* (1942–43) |
| YB | Station Flight RAF Bentwaters | |
| YB | No. 17 Squadron RAF | 17 Sqn |
| YB | No. 29 Squadron RAF | 29 Sqn |
| YD | No. 242 Squadron RAF | 242 Sqn |
| YD | No. 255 Squadron RAF | 255 Sqn |
| YE | No. 250 Squadron RAF | 250 Sqn |
| YE | No. 289 Squadron RAF | 289 Sqn |
| YF | No. 280 Squadron RAF | 280 Sqn |
| YF | No. 505 Squadron RAF | 505 Sqn (not formed) |
| YF | Station Flight RAF Scampton | |
| YG | No. 156 Squadron RAF | 156 Sqn |
| YG | No. 502 Squadron RAF | 502 Sqn |
| YG | No. 646 Squadron RAF | 646 Sqn (not formed) |
| YH | No. 21 Squadron RAF | 21 Sqn |
| YH | No. 11 Squadron RAF | 11 Sqn |
| YI | No. 423 Squadron RCAF | 423 Sqn RCAF (sometimes 423 (RCAF) Sqn) |
| YJ | No. 152 Squadron RAF | 152 Sqn |
| YJ | Station Flight RAF Metheringham | |
| YK | No. 80 Squadron RAF | 80 Sqn |
| YK | No. 274 Squadron RAF | 274 Sqn |
| YK | No. 340 (French) Squadron RAF | 340 French Sqn |
| YL | No. 27 Operational Training Unit RAF | 27 OTU |
| YM | No. 350 (Belgium) Squadron RAF | 350 Belgian Sqn |
| YM | No. 1528 Flight RAF | 1528 Flt |
| YM | No. 1529 Flight RAF | 1529 Flt |
| YN | No. 601 Squadron RAF | 601 Sqn |
| YO | No. 8 Squadron RAF | 8 Sqn |
| YO | No. 401 Squadron RCAF | 401 Sqn RCAF (sometimes 401 (RCAF) Sqn) |
| YO | Station Flight RAF Down Ampney | |
| YP | No. 23 Squadron RAF | 23 Sqn |
| YP | No. 165 Squadron RAF | 165 Sqn |
| YQ | No. 217 Squadron RAF | 217 Sqn |
| YQ | No. 616 Squadron RAF | 616 Sqn |
| YR | No. 133 Squadron RAF | 133 Sqn |
| YR | No. 20 Operational Training Unit RAF | 20 OTU |
| YS | No. 77 Squadron RAF | 87 Sqn |
| YS | No. 271 Squadron RAF | 271 Sqn |
| YT | No. 65 Squadron RAF | 65 Sqn |
| YT | No. 648 Squadron RAF | 648 Sqn (not formed) |
| YU | Station Flight RAF Lossiemouth | |
| YV | No. 287 Squadron RAF | 287 Sqn |
| YV | No. 48 Group Communication Flight RAF | 48 Gp Comm Flt |
| YW | No. 515 Squadron RAF(Apr 1939 – Sep 1939) | 515 Sqn |
| YW | No. 1660 Conversion Unit RAF | 1660 CU |
| YW | No. 230 Operational Conversion Unit RAF | 230 OCU |
| YX | No. 54 Operational Training Unit RAF | 54 OTU |
| YX | No. 614 Squadron RAF | 614 Sqn |
| YY | No. 1332 Conversion Unit RAF | 1332 CU |
| YY | No. 241 Operational Conversion Unit RAF | 241 OCU |
| YY | No. 78 Squadron RAF | 88 Sqn |
| YZ | No. 146 Squadron RAF | 146 Sqn |
| YZ | No. 617 Squadron RAF | 617 Sqn |
| YZ | No. 1651 Conversion Unit RAF | 1651 CU |
| Y2 | No. 442 Squadron RCAF | 442 Sqn RCAF (sometimes 442 (RCAF) Sqn) |
| Y3 | No. 202 Squadron RAF | 202 Sqn |
| Y3 | No. 518 Squadron RAF | 518 Sqn |
| Y5 | Station Flight RAF Dallachy | |
| Z | No. 205 Advanced Flying School RAF | 205 AFS |
| Z | No. 3 Air Navigation School RAF | 3 ANS |
| Z | No. 229 Operational Conversion Unit RAF | 229 OCU |
| Z | No. 5 Flying Training School RAF | 5 FTS |
| ZA | No. 10 Squadron RAF | 10 Sqn |
| ZA | No. 31 Squadron RAF | 31 Sqn |
| ZA | Metropolitan Communication Flight RAF | Metro Comm Flt |
| ZB | No. 1658 Conversion Unit RAF | 1658 CU |
| ZD | No. 6 Squadron RAF | 6 Sqn |
| ZD | No. 116 Squadron RAF | 116 Sqn |
| ZD | No. 222 Squadron RAF | 222 Sqn |
| ZE | No. 52 Squadron RAF | 52 Sqn |
| ZE | No. 123 Squadron RAF | 123 Sqn |
| ZE | No. 293 Squadron RAF | 293 Sqn |
| ZE | Central Fighter Establishment | CFE |
| ZF | No. 308 Polish Fighter Squadron | 308 Polish Sqn |
| TS | No. 548 Squadron RAF | 548 (RAF) Sqn, in SW Pacific under RAAF operational command, 1943–45; or 548 Sqn RAF |
| ZF | No. 549 Squadron RAF | 549 (RAF) Sqn, in SW Pacific under RAAF operational command, 1943–45; or 549 Sqn RAF |
| ZG | No. 94 Squadron RAF | 94 Sqn |
| ZG | No. 322 (Dutch) Squadron RAF | 322 Dutch Sqn |
| ZG | No. 10 Operational Training Unit RAF | 10 OTU |
| ZH | No. 266 Squadron RAF | 266 Sqn |
| ZH | No. 501 Squadron RAF | 501 Sqn |
| ZJ | No. 96 Squadron RAF | 96 Sqn |
| ZJ | No. 271 Squadron RAF | 271 Sqn |
| ZK | No. 24 Squadron RAF | 24 Sqn |
| ZK | No. 25 Squadron RAF | 25 Sqn |
| ZL | No. 77 Squadron RAF | 87 Sqn |
| ZL | No. 427 Squadron RCAF | 427 Sqn RCAF (sometimes 427 (RCAF) Sqn) |
| ZM | No. 185 Squadron RAF | 185 Sqn |
| ZM | No. 201 Squadron RAF | 201 Sqn |
| ZN | No. 106 Squadron RAF | 106 Sqn |
| ZN | No. 300 Polish Bomber Squadron | 300 Polish Sqn |
| ZO | No. 196 Squadron RAF | 196 Sqn |
| ZP | 15 Squadron SAAF | 15 Sqn SAAF |
| ZP | No. 74 Squadron RAF | 74 Sqn |
| ZP | No. 336 (Greek) Squadron RAF | 336 Greek Sqn |
| ZP | No. 457 Squadron RAAF (1943–45) | 457 Sqn RAAF; SW Pacific. |
| ZP | No. 1473 Flight RAF | 1473 Flt |
| ZP | No. 25 Operational Training Unit RAF | 25 OTU |
| ZQ | No. 322 (Dutch) Squadron RAF | 322 Dutch Sqn |
| ZQ | Bomber Command Instructors School RAF | BCIS |
| ZQ | Fighter Interception Unit RAF | FIU |
| ZQ | Central Fighter Establishment RAF | CFE |
| ZR | No. 309 (Polish) Squadron RAF | 309 Polish Sqn |
| ZR | No. 613 Squadron RAF | 613 Sqn |
| ZR | No. 2 Operational Training Unit RAF | 2 OTU |
| ZR | No. 107 Operational Training Unit RAF | 107 OTU |
| ZR | No. 1333 Conversion Unit RAF | 1333 CU |
| ZS | No. 233 Squadron RAF | 233 Sqn |
| ZS | No. 647 Squadron RAF | 647 Sqn (not formed) |
| ZS | No. 1336 Conversion Unit RAF | 1336 CU |
| ZT | No. 97 Squadron RAF | 97 Sqn |
| ZT | No. 258 Squadron RAF | 258 Sqn |
| ZT | No. 602 Squadron RAF | 602 Sqn |
| ZT | No. 20 Operational Training Unit RAF | 20 OTU |
| ZU | No. 1664 Conversion Unit RAF | 1664 CU |
| ZV | No. 19 Operational Training Unit RAF | 19 OTU |
| ZW | No. 48 Squadron RAF | 48 Sqn |
| ZW | No. 140 Squadron RAF | 140 Sqn |
| ZW | No. 1359 Flight RAF | 1359 Flt |
| ZX | No. 145 Squadron RAF | 145 Sqn Polish Fighting Team |
| ZX | Polish Fighting Team | PFT |
| ZX | No. 3 Tactical Exercise Unit RAF | 3 TEU |
| ZX | No. 55 Operational Training Unit RAF | 55 OTU |
| ZY | No. 247 Squadron RAF | 247 Sqn |
| ZZ | No. 220 Squadron RAF | 220 Sqn |
| Z2 | No. 437 Squadron RCAF | 437 Sqn RCAF (sometimes 437 (RCAF) Sqn) |
| Z4 | No. 10 Maintenance Unit RAF | 10 MU |
| Z5 | No. 462 Squadron RAF | 462 Sqn |
| Z8 | No. 45 Maintenance Unit RAF | 45 MU |
| Z9 | No. 519 Squadron RAF | 519 Sqn |

### Numbers

| squadron code | unit | unit shorthand |
| 1 | No. 59 Squadron RAF | 59 Sqn |
| 1 | No. 172 Squadron RAF | 172 Sqn |
| 1 | No. 206 Squadron RAF | 206 Sqn |
| 1 | No. 407 Squadron RCAF | 407 Sqn RCAF (sometimes 407 (RCAF) Sqn) |
| 1 | No. 601 Squadron RAF | 601 Sqn |
| 1 | No. 3 School of General Reconnaissance RAF | 3 S of GR |
| 1 | No. 1 Radio School RAF | 1 RS |
| 1C | Station Flight RAF Scampton | |
| 2 | No. 143 Squadron RAF | 143 Sqn |
| 2 | No. 220 Squadron RAF | 220 Sqn |
| 2 | No. 304 (Polish) Squadron RAF | 304 Polish Sqn |
| 2 | No. 404 Squadron RCAF | 404 Sqn RCAF (sometimes 404 (RCAF) Sqn) |
| 2 | No. 407 Squadron RCAF | 407 Sqn RCAF (sometimes 407 (RCAF) Sqn) |
| 2 | No. 422 Squadron RCAF | 422 Sqn RCAF (sometimes 422 (RCAF) Sqn) |
| 2 | No. 455 Squadron RAAF | 455 Sqn RAAF (sometimes 455 RAAF Sqn) |
| 2 | No. 603 Squadron RAF | 603 Sqn |
| 2 | No. 3 School of General Reconnaissance RAF | 3 S of GR |
| 2 | No. 2 Radio School RAF | 2 RS |
| 2A | Station Flight RAF St Eval | |
| 2B | No. 272 Maintenance Unit RAF | 272 MU |
| 2H | Station Flight RAF Brawdy | |
| 2I | No. 443 Squadron RCAF | 443 Sqn RCAF (sometimes 443 (RCAF) Sqn) |
| 2K | No. 1668 Conversion Unit RAF | 1668 CU |
| 2L | No. 9 Maintenance Unit RAF | 9 MU |
| 2M | No. 520 Squadron RAF | 520 Sqn |
| 2N | Station Flight RAF Foulsham | |
| 2O | No. 84 Group Communication Flight RAF | 84 Gp Comm Flt |
| 2P | No. 644 Squadron RAF | 644 Sqn |
| 2Q | No. 88 Group Communication Flight RAF | 88 Gp Comm Flt |
| 2V | No. 18 Group Communication Flight RAF | 18 Gp Comm Flt |
| 2V | No. 547 Squadron RAF | 547 Sqn |
| 2W | No. 3 School of General Reconnaissance RAF | 3 SofGR |
| 2X | No. 85 Operational Training Unit RAF | 85 OTU |
| 2Y | No. 345 (French) Squadron RAF | 345 Sqn |
| 3 | No. 280 Squadron RAF | 280 Sqn |
| 3 | No. 423 Squadron RCAF | 423 Sqn RCAF (sometimes 423 (RCAF) Sqn) |
| 3 | No. 601 Squadron RAF | 601 Sqn |
| 3 | No. 3 School of General Reconnaissance RAF | 3 S of GR |
| 3B | No. 23 Maintenance Unit RAF | 23 MU |
| 3C | No. 1 Lancaster Finishing School RAF | 1 LFS |
| 3D | No. 4 Ferry Pool RAF | 4 FP |
| 4D | No. 74 Squadron RAF | 74 Sqn |
| 4D | No. 48 Maintenance Unit RAF | 48 MU |
| 3E | No. 100 Group Communication Flight RAF | 100 Gp Comm Flt |
| 3F | British Air Forces of Occupation Communication Wing RAF | BAFO Comm Wg |
| 3G | No. 111 Operational Training Unit RAF | 111 OTU |
| 3H | No. 80 Operational Training Unit RAF | 85 OTU |
| 3J | No. 13 Maintenance Unit RAF | 13 MU |
| 3K | No. 1695 Flight RAF | 1695 Flt |
| 3L | Fighter Command Control and Reporting School RAF | FCC&RS |
| 3M | No. 679 Squadron RAF | 679 Sqn |
| 3M | No. 48 Group Communication Flight RAF | 48 Gp Comm Flt |
| 3O | Station Flight RAF Wratting Common | |
| 3P | No. 515 Squadron RAF (Feb 1944 – Jun 1945) | 515 Sqn |
| 3S | No. 3 Group Communication Flight RAF | 3 Gp Comm Flt |
| 3T | Station Flight RAF Acaster Malbis | |
| 3V | No. 1 Group Communication Flight RAF | 1 Gp Comm Flt |
| 3W | No. 322 (Dutch) Squadron RAF | 322 Dutch Sqn |
| 3X | No. 38 Maintenance Unit RAF | 38 MU |
| 3Y | No. 577 Squadron RAF | 577 Sqn |
| 4 | No. 3 School of General Reconnaissance RAF | 3 SofGR |
| 4 | No. 4 Radio School RAF | 4 RS |
| 4A | No. 2 Group Communication Flight RAF | 2 Gp Comm Flt |
| 4B | No. 5 Group Communication Flight RAF | 5 Gp Comm Flt |
| 4D | No. 74 Squadron RAF | 84 Sqn |
| 4E | No. 1687 Flight RAF | 1687 Flt |
| 4H | No. 142 Squadron RAF | 142 Sqn |
| 4J | No. 5 Maintenance Unit RAF | 5 MU |
| 4K | Station Flight RAF West Malling | |
| 4L | Station Flight RAF Melton Mowbray | |
| 4M | No. 695 Squadron RAF | 956 Sqn |
| 4Q | No. 59 Operational Training Unit RAF | 59 OTU |
| 4Q | Coastal Command Fighter Affiliation Unit RAF | CCFAU |
| 4S | Central Signals Establishment RAF | CSE |
| 4T | Station Flight RAF Portreath | |
| 4U | No. 30 Maintenance Unit RAF | 30 MU |
| 4W | Station Flight RAF Snaith | |
| 4X | No. 230 Squadron RAF | 230 Sqn |
| 4X | No. 1692 Flight RAF | 1692 Flt |
| 4Z | No. 1699 Flight RAF | 1699 Flt |
| 4Z | No. 1699 Conversion Unit RAF | 1699 CU |
| 4Z | Bomber Command Communication Squadron RAF | BC Comm Sqn |
| 5 | No. 3 School of General Reconnaissance RAF | 3 S of GR |
| 5 | School of Air Sea Rescue RAF | S of ASR |
| 5 | No. 5 Middle East Training School RAF | 5 METS |
| 5 | No. 10 Radio School RAF | 10 RS |
| 5A | No. 329 (French) Squadron RAF | 329 French Sqn |
| 5D | Station Flight RAF Gibraltar | |
| 5F | No. 147 Squadron RAF | 147 Sqn |
| 5G | No. 299 Squadron RAF | 299 Sqn |
| 5H | Station Flight RAF Chivenor | |
| 5I | Station Flight RAF Benson | |
| 5J | No. 126 Squadron RAF | 126 Sqn |
| 5K | No. 39 Maintenance Unit RAF | 39 MU |
| 5N | No. 38 Group Communication Flight RAF | 38 Gp Comm Flt |
| 5O | No. 521 Squadron RAF | 521 Sqn |
| 5R | No. 33 Squadron RAF | 33 Sqn |
| 5S | No. 691 Squadron RAF | 691 Sqn |
| 5T | No. 233 Squadron RAF | 233 Sqn |
| 5V | No. 439 Squadron RCAF | 439 Sqn RCAF (sometimes 439 (RCAF) Sqn) |
| 6 | No. 600 Squadron RAF | 600 Sqn |
| 6 | No. 11 Radio School RAF | 11 RS |
| 6B | Station Flight RAF Tempsford | |
| 6C | Photographic Reconnaissance Development Unit RAF | PRDU |
| 6D | No. 631 Squadron RAF | 631 Sqn |
| 6F | No. 1669 Conversion Unit RAF | 1669 CU |
| 6G | No. 223 Squadron RAF | 223 Sqn |
| 6H | No. 96 Squadron RAF | 96 Sqn |
| 6H | No. 1688 Flight RAF | 1688 Flt |
| 6J | No. 34 Squadron RAF | 34 Sqn |
| 6O | No. 582 Squadron RAF | 582 Sqn |
| 6Q | Station Flight RAF Pembroke Dock | |
| 6R | No. 41 Operational Training Unit RAF | 41 OTU |
| 6T | No. 608 Squadron RAF | 608 Sqn |
| 6U | No. 415 Squadron RCAF | 415 Sqn RCAF (sometimes 415 (RCAF) Sqn) |
| 6V | Station Flight RAF Cottesmore | |
| 6Y | No. 171 Squadron RAF | 171 Sqn |
| 6Z | No. 19 Maintenance Unit RAF | 19 MU |
| 7 | No. 12 Radio School RAF | 12 RS |
| 7A | No. 614 Squadron RAF | 614 Sqn |
| 7B | No. 5 Squadron RAF | 5 Sqn |
| 7C | No. 595 Squadron RAF | 595 Sqn |
| 7D | No. 296 Squadron RAF | 296 Sqn |
| 7E | No. 327 (French) Squadron RAF | 327 French Sqn |
| 7G | Station Flight RAF Northolt | |
| 7H | No. 84 Group Communication Flight RAF | 84 Gp Comm Flt |
| 7I | Station Flight RAF Acklington | |
| 7K | Survival and Rescue Training Unit RAF | S&RTU |
| 7L | No. 59 Operational Training Unit RAF | 59 OTU |
| 7M | No. 1 Parachute Training School RAF | 1 PTS |
| 7N | Signals Flying Unit RAF | SFU |
| 7R | No. 524 Squadron RAF | 524 Sqn |
| 7S | No. 83 Group Support Unit RAF | 83 Gp SU |
| 7T | No. 169 Squadron RAF | 169 Sqn |
| 7U | Station Flight RAF Bardney | |
| 7X | Station Flight RAF Aldergrove | |
| 7Z | No. 1381 Conversion Unit RAF | 1381 CU |
| 8A | No. 298 Squadron RAF | 298 Sqn |
| 8B | No. 1508 Flight RAF | 1508 Flt |
| 8C | No. 12 Maintenance Unit RAF | 12 MU |
| 8D | No. 220 Squadron RAF | 220 Sqn |
| 8E | No. 295 Squadron RAF | 295 Sqn |
| 8F | No. 105 Operational Training Unit RAF | 105 OTU |
| 8F | No. 1381 Conversion Unit RAF | 1381 CU |
| 8H | No. 8 Group Communication Flight RAF | 8 Gp Comm Flt |
| 8I | No. 2 Armament Practice Station | 2 APS |
| 8I | Armament Practice Station Acklington | APS Acklington |
| 8K | No. 571 Squadron RAF | 571 Sqn |
| 8L | No. 92 Squadron RAF | 92 Sqn |
| 8P | No. 525 Squadron RAF | 525 Sqn |
| 8Q | No. 34 Squadron RAF | 34 Sqn |
| 8T | No. 298 Squadron RAF | 298 Sqn |
| 8U | Station Flight RAF Ballykelly | |
| 8V | No. 6 Operational Training Unit RAF | 6 OTU |
| 8V | No. 60 Operational Training Unit RAF | 60 OTU |
| 8W | No. 612 Squadron RAF | 612 Sqn |
| 8Y | No. 15 Maintenance Unit RAF | 15 MU |
| 8Z | No. 295 Squadron RAF | 295 Sqn |
| 9C | No. 82 Operational Training Unit RAF | 82 OTU |
| 9E | British Air Forces of Occupation Communication Squadron RAF | BAFO Comm Sqn |
| 9F | Station Flight RAF Stradishall | |
| 9G | No. 441 Squadron RCAF | 441 Sqn RCAF (sometimes 441 (RCAF) Sqn) |
| 9I | No. 326 (French) Squadron RAF | 326 French Sqn |
| 9J | No. 227 Squadron RAF | 227 Sqn |
| 9K | No. 1 Torpedo Training Unit RAF | 1 TTU |
| 9M | No. 1690 Flight RAF | 1690 Flt |
| 9N | No. 127 Squadron RAF | 127 Sqn |
| 9O | No. 44 Maintenance Unit RAF | 44 MU |
| 9P | No. 85 Operational Training Unit RAF | 85 OTU |
| 9R | No. 229 Squadron RAF | 229 Sqn |
| 9T | Signals Flying Unit RAF | SFU |
| 9U | No. 644 Squadron RAF | 644 Sqn |
| 9W | No. 296 Squadron RAF | 296 Sqn |
| 9X | No. 2 Ferry Pool RAF | 2 FP |
| 9Y | No. 20 Maintenance Unit RAF | 20 MU |
| 9Y | No. 132 Operational Training Unit RAF | 132 OTU |
| 09 | No. 9 Group Target Towing Flight RAF | 9 Gp TTF |
| 10 | No. 10 Group Target Towing Flight RAF | 10 Gp TTF |
| 11 | No. 11 Group Target Towing Flight RAF | 11 Gp TTF |
| 12 | No. 12 Group Target Towing Flight RAF | 12 Gp TTF |
| 13 | No. 13 Group Target Towing Flight RAF | 13 Gp TTF |
| 26 | No. 26 Anti-Aircraft Co-operation Unit RAF | 26 AACU |
| 33 | No. 15 Squadron SAAF | 15 Sqn SAAF |
* = RAAF/RCAF unit that was not under RAF operational control.

## Radio call signs
### Transport Command 'O' series

Transport Command RAF applied the following three letter call-signs to its aircraft from 1944. Individual aircraft were given letter suffixes, making the code a four letter sequence.
Call signs :
| call sign | unit | unit shorthand |
| OAA | No. 24 Squadron RAF | 24 Sqn |
| OAP | Air Dispatch Letter Squadron | ADLS |
| ODA | No. 24 Squadron RAF | 24 Sqn |
| ODC | No. 238 Squadron RAF & No. 436 Squadron RAF | 238 Sqn & 436 Sqn |
| ODE | No. 62 Squadron RAF | 62 Sqn |
| ODF | No. 147 Squadron RAF | 147 Sqn |
| ODJ | No. 78 Squadron RAF | 78 Sqn |
| ODK | No. 512 Squadron RAF & No. 241 Squadron RAF | 512 Sqn & 241 Sqn |
| ODM | No. 436 Squadron RAF | 436 Sqn |
| ODN | No. 271 Squadron RAF | 271 Sqn |
| ODO | No. 437 Squadron RAF | 437 Sqn |
| ODP | No. 216 Squadron RAF | 216 Sqn |
| ODR | No. 48 Squadron RAF | 48 Sqn |
| ODS | No. 575 Squadron RAF | 575 Sqn |
| ODT | No. 53 Squadron RAF | 53 Sqn |
| ODU | No. 77 Squadron RAF & No. 31 Squadron RAF | 77 Sqn & 31 Sqn |
| ODV | No. 10 Squadron RAF | 10 Sqn |
| ODW | No. 52 Squadron RAF | 52 Sqn |
| ODY | No. 1333 (Transport) Conversion Unit RAF | 1333 (T)CU |
| ODZ | British Overseas Airways Corporation | BOAC |
| OFA | No. 10 Squadron RAF & No. 437 Squadron RAF | 10 Sqn & 437 Sqn |
| OFB | No. 77 Squadron RAF & No. 271 Squadron RAF | 77 Sqn & 271 Sqn |
| OFD | No. 575 Squadron RAF | 575 Sqn |
| OFG | No. 46 Squadron RAF | 46 Sqn |
| OFN | No. 575 Squadron RAF | 575 Sqn |
| OFR | No. 238 Squadron RAF | 238 Sqn |
| OFT | No. 187 Squadron RAF | 187 Sqn |
| OFU | No. 233 Squadron RAF | 233 Sqn |
| OFV | No. 271 Squadron RAF | 271 Sqn |
| OFZ | British Overseas Airways Corporation | BOAC |
| OHC | No. 1665 Heavy Conversion Unit RAF | 1665 HCU |
| OHD | No. 301 Polish Bomber Squadron | 301 Sqn |
| OHL | No. 113 Squadron RAF | 113 Sqn |
| OKD | No. 24 Squadron RAF | 24 Sqn |
| OKZ | British Overseas Airways Corporation | BOAC |
| OLB | No. 246 Squadron RAF | 246 Sqn |
| OLL | No. 111 Operational Training Unit RAF | 111 OTU |
| OLM | No. 206 Squadron RAF | 206 Sqn |
| OLN | No. 466 Squadron RAF | 466 Sqn |
| OLP | No. 426 Squadron RAF | 426 Sqn |
| OLW | No. 86 Squadron RAF | 86 Sqn |
| OLX | No. 220 Squadron RAF | 220 Sqn |
| OLZ | British Overseas Airways Corporation | BOAC |
| OQZ | British Overseas Airways Corporation | BOAC |
| ORJ | No. 51 Squadron RAF | 51 Sqn |
| ORK | No. 242 Squadron RAF | 242 Sqn |
| ORL | No. 46 Squadron RAF | 46 Sqn |
| ORO | No. 158 Squadron RAF | 158 Sqn |
| ORP | No. 196 Squadron RAF & No. 299 Squadron RAF | 196 Sqn & 299 Sqn |
| ORS | No. 299 Squadron RAF | 299 Sqn |
| ORT | No. 1588 (Heavy Freight) Flight RAF | 1588 (HF)Flt |
| OSD | No. 232 Squadron RAF | 232 Sqn |
| OSK | No. 233 Squadron RAF | 233 Sqn |
| OXG | No. 163 Squadron RAF | 163 Sqn |
| OYA | No. 511 Squadron RAF | 511 Sqn |
| OYB | No. 246 Squadron RAF | 246 Sqn |
| OYC | No. 511 Squadron RAF | 511 Sqn |
| OYD | No. 24 Squadron RAF | 24 Sqn |
| OYF | No. 242 Squadron RAF | 242 Sqn |
| OYZ | No. 1384 Conversion Unit RAF | 1384 CU |

### Transport Command 'MO' series

From 1945, RAF Transport Command pre-fixed the three letter call-signs with M. With individual aircraft allocated letter suffixes, the call-signs became five letter sequences.
| call sign | unit | unit shorthand |
| MOAY | No. 31 Squadron RAF | 31 Sqn |
| MOAZ | Colerne Communication Squadron RAF | Colerne Comm. Sqn. |
| MOBC | No. 242 Operational Conversion Unit RAF | 242 OCU |
| MOBM | No. 84 Squadron RAF | 84 Sqn |
| MODA | No. 24 Squadron RAF & No. 1 Parachute and Glider Training School RAF | 24 Sqn & 1 P&GTS |
| MODB | No. 53 Squadron RAF | 53 Sqn |
| MODC | No. 24 Squadron RAF, No. 27 Squadron RAF & No. 62 Squadron RAF | 24 Sqn, 27 Sqn & 62 Sqn |
| MODD | No. 238 Squadron RAF | 238 Sqn |
| MODF | No. 30 Squadron RAF & Airwork Ltd | 30 Sqn & Airwork |
| MODG | Queens Flight RAF | Queens Flt |
| MODW | Silver City Airways | Silver City |
| MOFA | No. 18 Squadron RAF | 18 Sqn |
| MOFB | No. 77 Squadron RAF | 77 Sqn |
| MOFC | Unknown – possibly 62Sqn | |
| MOFG | No. 46 Squadron RAF & No. 114 Squadron RAF | 46 Sqn & 114 Sqn |
| MOGA | No. 53 Squadron RAF & No. 99 Squadron RAF | 53 Sqn & 99 Sqn |
| MOGB | No. 47 Squadron RAF | 47 Sqn |
| MOGC | No. 242 Operational Conversion Unit RAF | 242 OCU |
| MOGH | No. 70 Squadron RAF | 70 Sqn |
| MOGP | No. 48 Squadron RAF | 48 Sqn |
| MOGX | Unknown – possibly an Abingdon Wing or Sqn | |
| MOGZ | No. 24 Squadron RAF | 24 Sqn |
| MOHA | No. 297 Squadron RAF | 297 Sqn |
| MOHC | No. 295 Squadron RAF & No. 113 Squadron RAF | 295 Sqn & 113 Sqn |
| MOHD | No. 47 Squadron RAF | 47 Sqn |
| MOJA | No. 99 Squadron RAF | 99 Sqn |
| MOKD | No. 24 Squadron RAF | 24 Sqn |
| MOLG | Queens Flight RAF | Queens Flt |
| MONY | Metropolitan Communication Squadron RAF | Metro Comm. Sqn. |
| MOPT | 2nd Tactical Air Force Communication Squadron RAF | 2TAF Comm. Sqn. |
| MORC | No. 242 Operational Conversion Unit RAF | 242 OCU |
| MORG | No. 30 Squadron RAF | 30 Sqn |
| MORK | Unknown | |
| MORM | No. 84 Squadron RAF | 84 Sqn |
| MORT | 2nd Tactical Air Force Communication Squadron RAF | 2TAF Comm. Sqn. |
| MOSC | No. 30 Squadron RAF | 30 Sqn |
| MOTA | No. 216 Squadron RAF | 216 Sqn |
| MOVF | No. 622 Squadron RAF & Airwork Ltd. | 622 Sqn & Airwork |
| MOWA | No. 40 Squadron RAF | 40 Sqn |
| MOWB | No. 59 Squadron RAF | 59 Sqn |
| MOYA | No. 51 Squadron RAF | 51 Sqn |
| MOYB | No. 59 Squadron RAF | 59 Sqn |
| MOYC | No. 511 Squadron RAF | 511 Sqn |
| MOYD | No. 24 Squadron RAF & No. 59 Squadron RAF | 24 Sqn & 59 Sqn |
| MOYF | No. 242 Squadron RAF | 242 Sqn |
| MOYG | No. 206 Squadron RAF | 206 Sqn |
| MOYX | No. 242 Squadron RAF | 242 Sqn |
| MOYU | Supreme Commander's Headquarters Communication Squadron RAF | SCH Comm. Sqn. |