122 (Warwickshire Regiment) Light Anti-Aircraft Regiment RA (TA) was converted in February 1942 from 45 Searchlight Regiment. The Regiment served in Anti-Aircraft Command and then Home Forces until moving to India in June 1943. 122 (Warwickshire Regiment) Light Anti-Aircraft Regiment RA (TA) was re-designated 122 Light Anti-Aircraft/Anti-Tank Regiment in January 1944. It was re-constituted as 580 (The Royal Warwickshire Regiment) Heavy Anti-Aircraft 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.
| Feb 42 | Formed from 45 Searchlight Regiment | ||
| Feb 42 | Home Forces | Bradford, Yorkshire, UK | |
| April 42 |  |
4 Anti-Aircraft Division, 54 Anti-Aircraft Brigade | Chester, Cheshire, UK |
| July 42 |  |
6 Anti-Aircraft Division, 71 Anti-Aircraft Brigade | Shepherdswell, Kent, UK |
| Oct 42 | Home Forces | Burnham, Buckinghamshire, UK | |
| Dec 42 | On loan to 63 Anti-Aircraft Brigade | Perranporth, Cornwall, UK | |
| Feb 43 |  |
War Office Control | Leeds, Yorkshire, UK |
| Jun 43 |  |
7 Indian Division | Ranchi, India |
| Aug 43 |  |
36 Indian Division | Khumbargaon, India |
| Jan 44 | Became 122 Light Anti-Aircraft/Anti-Tank Regiment 2 batteries to 100 Light Anti-Aircraft/Anti-Tank Regiment |
Batteries
| Feb 42 | 400, 401, 402, 403 |
| Sep 42 | 400, 401, 402 |
| Nov 43 | 400, 401, 402, X |