| Group | Squadron | Base | County | Arrived | Comments |
|---|---|---|---|---|---|
| 11 | 604 | North Weald | Essex | 03/09/39 | Blenheim I. |
| 11 | 604 | Northolt | Middlesex | 16/01/40 | Gladiator I, 05/40. |
| 11 | 604 | Manston | Kent | 15/05/40 | |
| 11 | 604 | Northolt | Middlesex | 20/06/40 | |
| 11 | 604 | Gravesend | Kent | 03/07/40 | Blenheim If. |
| 10 | 604 | Middle Wallop | Hampshire | 27/07/40 | Beaufighter If, 10/40. |
| 10 | 604 | Warmwell | Dorset | 12/08/42 | |
| 10 | 604 | Middle Wallop | Hampshire | 23/08/42 | |
| 10 | 604 | Predannack | Cornwall | 07/12/42 | |
| 11 | 604 | Ford | Sussex | 18/02/43 | |
| 13 | 604 | Scorton | Yorkshire | 24/04/43 | Beaufighter VIf. Mosquito XIII, 02/44. Mosquito XII, 02/44. |
| 12 | 604 | Church Fenton | Yorkshire | 25/04/44 | |
| 11 | 604 | Hurn | Hampshire | 03/05/44 | |
| 10 | 604 | Colerne | Wiltshire | 13/07/44 | |
| 10 | 604 | Zeals | Wiltshire | 25/07/44 | To Picauville, A8, 06/08/44. |
| 10 | 604 | Predannack | Cornwall | 24/09/44 | Ex-Carpiquet, B17. |
| 11 | 604 | Odiham | Hampshire | 05/12/44 | To Lille, B51, 31/12/44. |