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 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. 61 (Middlesex) Heavy Anti-Aircraft Regiment RA (TA) was reconstituted as 461 (Middlesex) Heavy 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 |  |
6 Anti-Aircraft Division, 37 Anti-Aircraft Brigade | Thames North, UK |
| Dec 41 |  |
10 Army, 8 Anti-Aircraft Brigade | Persia (Iran) & Iraq |
| Mar 42 |  |
Middle East Forces | Suez Canal, Egypt |
| Oct 42 |  |
8 Army, 17 Anti-Aircraft Brigade | Egypt |
| Jan 43 | |
8 Army, 17 Anti-Aircraft Brigade | Tobruk, Libya |
| Feb 43 | Diluted by African Pioneer Corps men | ||
| Mar 43 | |
8 Army | Tripoli, Libya |
| Sep 43 | |
8 Army, 73 Anti-Aircraft Brigade – RHQ, 170 & half 171 Batteries | Milazzo, Sicily |
| Jan 44 | |
8 Army, 73 Anti-Aircraft Brigade | Augusta, Sicily |
| Sep 44 |  |
Allied Forces HQ, 25 Anti-Aircraft Brigade | Apulia, Italy |
| Dec 44 | |
Allied Forces HQ, 22 Anti-Aircraft Brigade | Apulia, Italy |
| Apr 45 | |
Allied Forces HQ, 66 Anti-Aircraft Brigade | Genoa, Italy |
Batteries
| Sep 39 | 170, 171, 195 |