| Group | Squadron | Base | County | Arrived | Comments |
|---|---|---|---|---|---|
| 11 | 601 | Biggin Hill | Kent | 03/09/39 | Blenheim If. |
| 11 | 601 | Tangmere | Sussex | 30/12/39 | Hurricane I, 02/40. 1 Flight to France 16/05/40. |
| 11 | 601 | Middle Wallop | Hampshire | 01/06/40 | |
| 11 | 601 | Tangmere | Sussex | 17/06/40 | |
| 11 | 601 | Debden | Essex | 19/08/40 | |
| 11 | 601 | Tangmere | Sussex | 02/09/40 | |
| 10 | 601 | Exeter | Devon | 07/09/40 | |
| 11 | 601 | Northolt | Middlesex | 17/12/40 | Hurricane IIb, 03/41. |
| 11 | 601 | Manston | Kent | 01/05/41 | |
| 12 | 601 | Matlaske | Norfolk | 30/06/41 | |
| 12 | 601 | Duxford | Cambridgeshire | 16/08/41 | Airacobra I, 08/41. |
| 601 | Acaster Malbis | 06/01/42 | |||
| 12 | 601 | Digby | Lincolnshire | 25/03/42 | Spitfire Vb, 03/42. To Luqa, 10/04/42. |