23 Light Anti-Aircraft Regiment RA (TA) was formed at Bristol, in December 1938. The Regiment moved to Ceylon (Sri Lanka) in July 1942. Moving to India in April 1944, it was converted to 23 Parachute Light Anti-Aircraft/Anti-Tank Regiment in February 1945. 23 Light Anti-Aircraft Regiment RA (TA) re-constituted as 523 (Gloucestershire) Light 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.
| Sep 39 |  |
Southern Command | Bristol, UK |
| Oct 39 |  |
5 Anti-Aircraft Division, 65 Anti-Aircraft Brigade | Southampton, Hampshire, UK |
| Dec 41 | Home Forces | UK | |
| 1 Jul 42 |  |
Ceylon Command, 23 Anti-Aircraft Brigade | Colombo, Ceylon (Sri Lanka) |
| Apr 44 |  |
44 Indian Airborne Division | Secunderabad, India |
| Feb 45 | Became 23 Parachute Light Anti-Aircraft/Anti-Tank Regiment |
Batteries
| Sep 39 | 73, 74, 75, 130 |
| Nov 39 | 73, 74, 130 |
| Feb 41 | 73, 74, 130, 229 |
| Jul 42 | 73, 74, 130 |
Equipment
| Jul 42 | Bofors 40 mm |