11th Battalion London Regiment (Finsbury Rifles) (TA) was converted in December 1935 as 61 (Finsbury Rifles) Anti-Aircraft Brigade RA(TA). It was re-designated as 61 (Middlesex) Anti-Aircraft Brigade RA(TA) in October 1938 and became 61 (Middlesex) Anti-Aircraft Regiment RA(TA) in January 1939. It was re-designated 61 (Middlesex) Heavy Anti-Aircraft Regiment RA(TA) in June 1940. The Regiment was placed in suspended animation in September 1945 and was reconstituted as 461 (Middlesex) Heavy Anti-Aircraft Regiment RA(TA) in January 1947.
| Sep 39 | 37 Anti-Aircraft Brigade, 6 Anti-Aircraft Division | Thames North, UK |
| Dec 41 | 8 Anti-Aircraft Brigade, 10 Army | Persia (Iran) & Iraq |
| Mar 42 | Middle East Forces | Suez Canal, Egypt |
| Oct 42 | 17 Anti-Aircraft Brigade, 8 Army | Egypt |
| Jan 43 | 17 Anti-Aircraft Brigade, 8 Army | Tobruk, Libya |
| Feb 43 | Diluted by African Pioneer Corps men | |
| Mar 43 | 8 Army | Tripoli, Libya |
| Sep 43 | 73 Anti-Aircraft Brigade – RHQ, 170 & half 171 Batteries | Milazzo, Sicily |
| Jan 44 | 73 Anti-Aircraft Brigade | Augusta, Sicily |
| Sep 44 | 25 Anti-Aircraft Brigade | Apulia, Italy |
| Dec 44 | 22 Anti-Aircraft Brigade | Apulia, Italy |
| Apr 45 | 66 Anti-Aircraft Brigade | Genoa, Italy |
Batteries
| Sep 39 | 170, 171, 195 |
