112 Heavy Anti-Aircraft Regiment RA(TA) was formed with three batteries in October 1940. The Regiment was disbanded in October 1945.
| Oct 40 | Formed | |
| Oct 40 | 34 Anti-Aircraft Brigade, 11 Anti-Aircraft Division | Birmingham, UK |
| May 41 | 46 Anti-Aircraft Brigade, 8 Anti-Aircraft Division | South West England |
| Dec 41 | 45 Anti-Aircraft Brigade, 9 Anti-Aircraft Division | South Wales |
| May 42 | 61 Anti-Aircraft Brigade, 9 Anti-Aircraft Division | South Wales |
| Mar 44 | 2 Army | UK |
| Jun 44 | 2 Army | NW Europe |
Batteries
| Oct 40 | 351, 352, 353 |
| Sep 41 | 351, 352, 353, 380 |
| Aug 42 | 352, 353, 380 |
