# No. 240 Squadron RAF

No. 240 Squadron RAF was a Royal Air Force flying boat and seaplane squadron during World War I, World War II and up to 1959. It was then reformed as a strategic missile squadron, serving thus till 1963.

## History
### Formation and World War I

No. 240 Squadron of the Royal Air Force was formed at RAF Calshot on 20 August 1918 to provide anti-submarine protection, using its Short 184s seaplanes and Felixstowe F2A flying boats. It was disbanded on 15 May 1919.

### Reformation and World War II

The squadron was re-formed at RAF Calshot on 30 March 1937. It was at initially equipped with Supermarine Scapas and after a year converted to Short Singapores, which were followed a year later by the Saro London, planning to convert later to Saro Lerwicks, but getting Supermarine Stranraers in June 1940 instead. During March 1941 these were replaced with Consolidated Catalinas, to carry out anti-submarine patrols over the Atlantic Ocean. It then moved to India in March 1942 where it flew anti-shipping and submarine patrols from Red Hills Lake, where it was disbanded on 1 July 1945.
The squadron reformed that same day, 1 July 1945, from elements of 212 Squadron and 240 Squadron's Special Duties Flight. The squadron was continuing "special duties" into September 1945, evacuating Operation "Lunch" from the Andaman Islands on 7 September 1945. The squadron began converting to Short Sunderland Mk.Vs from 01 August 1945 before moving to Ceylon in January 1946, where it disbanded on 31 March 1946 at RAF Koggala.

### Post war: Shackletons and Missiles

On 1 May 1952 the squadron re-formed again at RAF Aldergrove and was equipped with Avro Shackleton Mk.1a maritime reconnaissance aircraft. The squadron moved to Northern Ireland in June 1952, where it disbanded on 1 November 1958 at RAF Ballykelly by being renumbered to 203 sqn.
The squadron reformed once again on 1 August 1959, as one of 20 Thor Strategic Missile (SM) Squadrons, associated with Project Emily. The squadron was equipped with three Thor Intermediate range ballistic missiles, and stationed at RAF Breighton.
In October 1962, during the Cuban Missile Crisis, the squadron was kept at full readiness, with the missiles aimed at strategic targets in the USSR. The squadron was disbanded with the termination of the Thor Programme in Great Britain, on 8 January 1963.

## Aircraft operated

Aircraft operated by No. 240 Squadron RAF :
| From | To | Aircraft | Variant |
| Aug 1918 | May 1919 | Curtiss H-12 | |
| Aug 1918 | May 1919 | Fairey Campania | |
| Aug 1918 | May 1919 | Felixstowe F.2 | a |
| Aug 1918 | May 1919 | Short 320 | |
| Aug 1918 | May 1919 | Short Type 184 | b |
| Mar 1937 | Jan 1939 | Supermarine Scapa | |
| Nov 1938 | Jan 1939 | Short Singapore | Mk.III |
| Jul 1939 | Jun 1940 | Saro London | Mk.II |
| Jun 1940 | Jan 1941 | Supermarine Stranraer | Mk.I |
| Mar 1941 | Dec 1945 | Consolidated Catalina | Mks.I, Ib & II |
| Jul 1945 | Mar 1946 | Short Sunderland | Mk.V |
| May 1952 | Nov 1958 | Avro Shackleton | MR.1a |
| Jul 1953 | Aug 1954 | Avro Shackleton | MR.2 |
| Aug 1959 | Jan 1963 | Douglas Thor | SM.75 |

## Squadron bases

Bases and airfields used by No. 240 Squadron RAF :
| From | To | Base | Remarks |
| 20 August 1918 | 15 May 1919 | RAF Calshot, Hampshire | |
| 30 March 1937 | 12 August 1939 | RAF Calshot, Hampshire | |
| 12 August 1939 | 4 November 1939 | RAF Invergordon, Ross and Cromarty, Scotland | |
| 4 November 1939 | 1 April 1940 | RAF Sullom Voe, Shetland, Scotland | |
| 1 April 1940 | 27 May 1940 | RAF Invergordon, Ross and Cromarty, Scotland | |
| 27 May 1940 | 30 July 1940 | RAF Pembroke Dock, Pembrokeshire, Wales | |
| 30 July 1940 | 28 March 1941 | RAF Stranraer, Wigtownshire, Scotland | Also flying Stranraer |
| 28 March 1941 | 25 August 1941 | RAF Killadeas, County Fermanagh, Northern Ireland | |
| 25 August 1941 | 6 June 1942 | RAF Castle Archdale (Lower Lough Erne), County Fermanagh, Northern Ireland | Ground echelon left 29 March 1942 |
| 29 March 1942 | 4 July 1942 | En route to British India | En route to British India |
| 4 July 1942 | 1 July 1945 | RAF Red Hills Lake, Madras, British India | |
| 1 July 1945 | 10 January 1946 | RAF Red Hills Lake, Madras, British India | Reformation as Short Sunderland unit |
| 10 January 1946 | 31 March 1946 | RAF Koggala, Ceylon | |
| 1 May 1952 | 25 May 1952 | RAF Aldergrove, County Antrim, Northern Ireland | |
| 25 May 1952 | 5 June 1952 | RAF St Eval, Cornwall | |
| 5 June 1952 | 1 November 1958 | RAF Ballykelly, County Londonderry, Northern Ireland | |
| 1 August 1959 | 8 January 1963 | RAF Breighton, East Riding of Yorkshire | as No. 240 (SM) Squadron |