109 Heavy Anti-Aircraft Regiment RA(TA) was formed at Weybourne Practice Camp in September 1940. The Regiment was disbanded in February 1946.
| Sep 40 | Formed | Weybourne, Norfolk, UK |
| Sep 40 | 49 Anti-Aircraft Brigade, 1 Anti-Aircraft Division | London, UK |
| Dec 41 | 48 Anti-Aircraft Brigade, 1 Anti-Aircraft Division | UK |
| Jun 42 | 49 Anti-Aircraft Brigade, 1 Anti-Aircraft Division | UK |
| May 43 | 103 Anti-Aircraft Brigade, GHQ Reserve | Norwich, Norfolk, UK |
| Mar 44 | 2 Army | UK |
| Jun 44 | 2 Army | NW Europe |
Batteries
| Sep 40 | 342, 343, 344 |
| Jan 41 | 342, 343, 344, 380 |
| Sep 41 | 342, 343, 344, 440 |
| Jul 42 | 342, 343, 344 |
Gun Sites Occupied
344 Battery
| Dates | Gun Site | Gun Defended Area |
| 1942 | BM5 Old Woking | Brooklands |
