43 (5th Duke of Wellington’s Regiment) Searchlight Regiment RA (TA) formed in August 1940 by the transfer of 41 (5th Duke of Wellington’s Regiment) Anti-Aircraft Battalion Royal Engineers (TA) to the RA. The Regiment served in Anti-Aircraft Command until conversion in late 1944. 43 (5th Duke of Wellington’s Regiment) Searchlight Regiment RA (TA) was converted to 43 Garrison Regiment RA in October 1944 and to 600 Infantry Regiment RA the following month. It was re-constituted as 578 (5th Battalion The Duke of Wellington’s 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 43 Anti-Aircraft Battalion Royal Engineers |
Huddersfield, Yorkshire, UK | |
| Aug 40 |  |
7 Anti-Aircraft Division, 31 Anti-Aircraft Brigade | Huddersfield, Yorkshire, UK |
| Nov 40 |  |
10 Anti-Aircraft Division, 31 Anti-Aircraft Brigade | Humber Estuary, Yorkshire, UK |
| Oct 42 |  |
5 Anti-Aircraft Group, 31 Anti-Aircraft Brigade | Humber Estuary, Yorkshire, UK |
| Feb 43 | |
5 Anti-Aircraft Group, 32 Anti-Aircraft Brigade | Midlands, UK |
| Jun 44 | |
5 Anti-Aircraft Group, 50 Searchlight Brigade | Midlands, UK |
| Oct 44 | Became 43 Garrison Regiment RA | UK |
Batteries
| Aug 40 | 370, 371, 372, 373 |