| Group | Squadron | Base | County | Arrived | Comments |
|---|---|---|---|---|---|
| 11 | 91 | Hawkinge | Kent | 11/01/41 | Formed from No. 421 Flight. Spitfire IIa, 01/41. |
| 11 | 91 | Lympne | Kent | 02/10/42 | Spitfire Vb, 03/41. |
| 11 | 91 | Hawkinge | Kent | 09/10/42 | |
| 11 | 91 | Lympne | Kent | 23/11/42 | |
| 11 | 91 | Hawkinge | Kent | 11/01/43 | |
| 9 | 91 | Honiley | Warwickshire | 20/04/43 | Spitfire XII, 04/43. |
| 12 | 91 | Wittering | Northamptonshire | 09/05/43 | |
| 11 | 91 | Hawkinge | Kent | 21/05/43 | |
| 11 | 91 | Westhampnett | Sussex | 28/06/43 | |
| 11 | 91 | Tangmere | Sussex | 04/10/43 | |
| 12 | 91 | Hutton Cranswick | Yorkshire | 08/02/44 | |
| 11 | 91 | Tangmere | Sussex | 20/02/44 | |
| 11 | 91 | Castle Camps | Essex | 29/02/44 | |
| 13 | 91 | Drem | East Lothian | 17/03/44 | Spitfire XIV, 03/44. |
| 11 | 91 | West Malling | Kent | 23/04/44 | |
| 2TAF | 91 | Deanland | Sussex | 21/07/44 | Spitfire IXb, 08/44. |
| 11 | 91 | Biggin Hill | Kent | 07/10/44 | |
| 11 | 91 | Manston | Kent | 29/10/44 | Spitfire F21, 01/45. |
| 12 | 91 | Ludham | Norfolk | 08/04/45 | Moved 14/07/45. |