40 (The Sherwood Foresters) Searchlight Regiment RA(TA) formed in August 1940 by the transfer of 40 (The Sherwood Foresters) Anti-Aircraft Battalion Royal Engineers (TA) to the RA. The Regiment was converted to 149 Light Anti-Aircraft Regiment RA in June 1943. It was re-constituted as 575 (6th Battalion The Sherwood Foresters) Light Anti-Aircraft Regiment RA(TA) in January 1947.
| Aug 40 | Formed from 40 Anti-Aircraft Battalion Royal Engineers | |
| Aug 40 | 39 Anti-Aircraft Brigade, 10 Anti-Aircraft Division | Scunthorpe, Lincolnshire, UK |
| May 43 | 103 Anti-Aircraft Brigade | Holywood, Co. Down, UK |
| Jun 43 | Became 149 Light Anti-Aircraft Regiment |
Batteries
| Aug 40 | 358, 359, 360, 361 |
| May 43 | 358, 360, 361 |
