175 Heavy Anti-Aircraft Regiment RA(TA) was formed at Clifton in October 1942. The Regiment was considered a new War Formed Regiment in January 1947 and in the April was re-designated 113 Anti-Aircraft Regiment RA.
| Oct 42 | Formed | Clifton, Bristol, UK |
| Oct 42 | 46 Anti-Aircraft Brigade | UK |
| Dec 42 | 63 Anti-Aircraft Brigade | Scotland |
| Apr 43 | War Office Reserve | UK |
| May 43 | 15 Anti-Aircraft Brigade | Gibraltar |
| Feb 44 | HQRA | Gibraltar |
Batteries
| Oct 42 | 375, 386, 441 |
| May 43 | 228, 375, 386, 441 |
| Aug 43 | 375, 386, 441, 596 |
| Mar 44 | 375, 386, 441, 596, 451 LAA, 1 Radar Bty, 142 Gun Operations Room, 1 AA Z Troop |
| Aug 44 | 375, 386, 441, 451 LAA, 1 Radar Bty, 142 Gun Operations Room |
| Oct 44 | 375, 386, 451 LAA, 142 Gun Operations Room |
