# No. 91 Group RAF

No. 91 Group RAF is a former Royal Air Force group.
The group was formed on 11 May 1942, at Abingdon as No. 91 (Operational Training) Group RAF in RAF Bomber Command, it was previously No. 6 Group RAF. Within a matter of weeks it was called upon to provide over 200 aircraft and crews for Operation Millenium, the first 1,000 bomber raid, launched against Cologne on the night of 30/31 May 1942.
On 14 April 1947, the Group moved to Morton Hall, Swinderby and was amalgamated with and renamed No. 21 Group RAF on 1 May 1947.

## Structure

* February 1943 - HQ at Abingdon
** No. 10 Operational Training Unit RAF at RAF Abingdon / RAF Stanton Harcourt with the Armstrong Whitworth Whitley V
** No. 15 Operational Training Unit RAF at RAF Harwell / RAF Hampstead Norris with the Vickers Wellington Ic
** No. 19 Operational Training Unit RAF at RAF Kinloss / RAF Forres with the Armstrong Whitworth Whitley V
** No. 20 Operational Training Unit RAF at RAF Lossiemouth / RAF Elgin with the Vickers Wellington I
** No. 21 Operational Training Unit RAF at RAF Moreton-in-Marsh / RAF Edgehill with the Vickers Wellington I
** No. 22 Operational Training Unit RAF at RAF Wellesbourne Mountford / RAF Gaydon with the Vickers Wellington I, III
** No. 23 Operational Training Unit RAF at RAF Pershore / RAF Stratford with the Vickers Wellington I
** No. 24 Operational Training Unit RAF at RAF Honeybourne / RAF Long Marston with the Armstrong Whitworth Whitley V
* February 1944 - HQ at Abingdon
** No. 10 Operational Training Unit RAF at RAF Abingdon / RAF Stanton Harcourt with the Armstrong Whitworth Whitley V, VII
** No. 15 Operational Training Unit RAF at RAF Harwell / RAF Hampstead Norris with the Vickers Wellington III, X
** No. 19 Operational Training Unit RAF at RAF Kinloss / RAF Forres with the Vickers Wellington III, X
** No. 20 Operational Training Unit RAF at RAF Lossiemouth / RAF Elgin with the Vickers Wellington III, X
** No. 21 Operational Training Unit RAF at RAF Moreton-in-Marsh / RAF Enstone with the Vickers Wellington III, X
** No. 22 Operational Training Unit RAF at RAF Wellesbourne Mountford / RAF Gaydon with the Vickers Wellington III, X
** No. 23 Operational Training Unit RAF at RAF Pershore / RAF Stratford with the Vickers Wellington III, X
** No. 24 Operational Training Unit RAF at RAF Honeybourne / RAF Long Marston with the Vickers Wellington III, X
* February 1945 - HQ at Abingdon
** No. 10 Operational Training Unit RAF at RAF Abingdon with the Vickers Wellington X
** No. 19 Operational Training Unit RAF at RAF Kinloss with the Vickers Wellington X
** No. 20 Operational Training Unit RAF at RAF Lossiemouth /RAF Elgin with the Vickers Wellington X
** No. 21 Operational Training Unit RAF at RAF Moreton-in-Marsh / RAF Enstone with the Vickers Wellington X
** No. 22 Operational Training Unit RAF at RAF Wellesbourne Mountford / RAF Gaydon with the Vickers Wellington III, X
** No. 24 Operational Training Unit RAF at RAF Honeybourne / RAF Long Marston with the Vickers Wellington X
** No. 27 Operational Training Unit RAF at RAF Lichfield / RAF Church Broughton with the Vickers Wellington X
** No. 30 Operational Training Unit RAF at RAF Gamston / RAF Hixon with the Vickers Wellington III, X