33 (St Pancras) Searchlight Regiment RA (TA) formed in August 1940 by the transfer of 33 (St Pancras) Anti-Aircraft Battalion Royal Engineers (TA) to the RA. The Regiment served in the UK in Anti-Aircraft Command until it converted to Infantry. 33 (St Pancras) Searchlight Regiment RA (TA) was converted to 632 Infantry Regiment RA in January 1945. It was re-constituted as 568 (St Pancras) (Mixed) Light Anti-Aircraft/Searchlight 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 33 Anti-Aircraft Battalion Royal Engineers | London, UK | |
| Aug 40 |  |
6 Anti-Aircraft Division, 6 Anti-Aircraft Brigade | Stanstead, Essex, UK |
| Apr 43 |  |
2 Anti-Aircraft Group, 27 Anti-Aircraft Brigade | Faversham, Kent, UK |
| Jan 45 | Became 632 Infantry Regiment RA |
Batteries
| Aug 40 | 332, 333, 334 |
| Jan 42 | 332, 333, 334, 543 |
| Mar 44 | 332, 333, 334 |