135 Light Anti-Aircraft Regiment RA (TA) was formed in February 1942 at Perth. The Regiment served in the UK in Anti-Aircraft Command until converting to Infantry. 135 Light Anti-Aircraft Regiment RA (TA) was re-organised in January 1945 as 629 Infantry Regiment RA and disbanded in November 1945.
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.
| Feb 42 | Formed in Air Defence Great Britain | Perth, Perthshire, UK | |
| Feb 42 |  |
3 Anti-Aircraft Division, 36 Anti-Aircraft Brigade | Scotland |
| Jun 42 | |
3 Anti-Aircraft Division, 52 Anti-Aircraft Brigade | Scotland |
| Jul 42 |  |
12 Anti-Aircraft Division, 63 Anti-Aircraft Brigade | Western Scotland |
| Aug 42 |  |
7 Anti-Aircraft Division, 36 Anti-Aircraft Brigade | UK |
| Jun 44 |  |
Kent Diver Belt | Kent, UK |
| Jan 45 | Became 629 Infantry Regiment RA |
Batteries
| Feb 42 | 94, 445, 460, 478 |
| May 42 | 94, 445, 450, 460 |
| Jul 42 | 445, 447, 450, 460 |
| May 44 | 445, 447, 450 |