| Group | Squadron | Base | County | Arrived | Comments |
|---|---|---|---|---|---|
| 13 | 603 | Turnhouse | Midlothian | 03/09/39 | Spitfire I. |
| 13 | 603 | Prestwick | Ayrshire | 16/12/39 | |
| 13 | 603 | Dyce | Aberdeenshire | 17/01/40 | |
| 13 | 603 | Montrose | 01/08/40 | Day of month arbitary. | |
| 11 | 603 | Hornchurch | Essex | 28/08/40 | Spitfire IIa, 11/40. |
| 11 | 603 | Rochford | Essex | 03/12/40 | |
| 13 | 603 | Drem | East Lothian | 13/12/40 | |
| 13 | 603 | Turnhouse | Midlothian | 27/02/41 | |
| 11 | 603 | Hornchurch | Essex | 16/05/41 | Spitfire Va, 05/41. |
| 11 | 603 | Rochford | Essex | 16/06/41 | |
| 11 | 603 | Hornchurch | Essex | 09/07/41 | Spitfire Vb, 08/41. |
| 11 | 603 | Fairlop | Essex | 12/11/41 | |
| 13 | 603 | Dyce | Aberdeenshire | 15/12/41 | |
| 14 | 603 | Peterhead | Aberdeenshire | 14/03/42 | To Malta, 13/04/42. |
| 12 | 603 | Coltishall | Norfolk | 10/01/45 | Renumbered from No. 229 Squadron. Spitfire LFXVIe, 01/45. |
| 12 | 603 | Ludham | Norfolk | 24/02/45 | |
| 12 | 603 | Coltishall | Norfolk | 05/04/45 | |
| 13 | 603 | Turnhouse | Midlothian | 28/04/45 | |
| 13 | 603 | Drem | East Lothian | 07/05/45 | Disbanded 15/08/45. |