45 (The Royal Warwickshire Regiment) Searchlight Regiment RA (TA) formed in August 1940 by the transfer of 45 (The Royal Warwickshire Regiment) Anti-Aircraft Battalion Royal Engineers (TA) to the RA. The Regiment served in Anti-Aircraft Command in the West Midlands until conversion to LAA. 45 (The Royal Warwickshire Regiment) Searchlight Regiment RA (TA) was converted to 122 Light Anti-Aircraft Regiment RA in February 1942. 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.
| Aug 40 | Formed from 45 Anti-Aircraft Battalion Royal Engineers | ||
| Aug 40 |  |
4 Anti-Aircraft Division, 54 Anti-Aircraft Brigade, | West Midlands, UK |
| Nov 40 |  |
11 Anti-Aircraft Division, 54 Anti-Aircraft Brigade, | West Midlands, UK |
| Feb 42 | Became 122 Light Anti-Aircraft Regiment |
Batteries
| Aug 40 | 378, 379, 380, 381 |