55 (Devon) Light Anti-Aircraft Regiment RA(TA) was formed as a duplicate of 51 (Devon) Light Anti-Aircraft Regiment, in 1939. The Regiment was converted to 55 Light Anti-Aircraft/Anti-Tank Regiment in July 1943 and re-designated 111 (Devon) Anti-Tank Regiment in September 1944. The Regiment was re-constituted as 852 (Devon) Tractor Battery RA(TA) in January 1947 but not reformed.
| Sep 39 | Home Forces | UK |
| Apr 40 | 6 Anti-Aircraft Brigade | Norway |
| Jun 40 | Home Forces | UK |
| Mar 42 | 1 Anti-Aircraft Brigade Royal Marines | Colombo, Ceylon (Sri Lanka) |
| Jul 43 | Calcutta Area | India |
| 29 Jul 43 | Became 55 Light Anti-Aircraft/Anti-Tank Regiment |
Batteries
| Sep 39 | 163, 164, 165 |
| Jun 42 | 163, 164, 165, 524 |
Equipment
| Apr 40 | Bofors 40 mm |
