56 (Cameronians) Searchlight Regiment RA (TA) formed in August 1940 by the transfer of 5/8th Battalion The Cameronians (Scottish Rifles) (56 Searchlight Regiment) (TA) to the RA. The Regiment was converted to 125 Light Anti-Aircraft Regiment in February 1942. It was re-constituted as 591 (Cameronians) (Mixed) Light Anti-Aircraft/Searchlight Regiment RA (TA) in January 1947.
Illustrations of the formation badges under which a unit served or supported are given. This is no guarantee that the unit used this formations badge.
| Nov 38 | 5/8th Battalion Cameronians (Scottish Rifles) (56th Searchlight Regiment) |
Glasgow, UK | |
| Aug 40 |  |
Became RA – 3 Anti-Aircraft Division, 52 Light Anti-Aircraft Brigade | Eastern Scotland |
| Feb 42 | Became 125 Light Anti-Aircraft Regiment |
Batteries
| Nov 38 | 417, 418, 419, 420 |
| Aug 39 | 417, 418, 419 |
| Feb 41 | 417, 418, 419, 535 |
| Jan 42 | 357, 417, 418, 419 |