56 Heavy Regiment RA was formed from a cadre from 64 Field Regiment RA(TA) in January 1940 at St Leonards. The Regiment was disbanded in March 1946 in NW Europe.
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.
| Jan 40 | Formed from cadre 64 Field Regiment | St Leonards, Sussex, UK | |
| Jan 40 |  |
Eastern Command, Home Forces | Hastings, Sussex, UK |
| Apr 40 | |
Eastern Command, Home Forces | Bexhill, Sussex, UK |
| Aug 40 | |
Eastern Command, Home Forces | Rolvenden, Kent, UK |
| Sep 40 |  |
45 Infantry Division | Rolvenden, Kent, UK |
| Mar 41 | |
Eastern Command, Home Forces | Cuckfield, Sussex, UK |
| Dec 42 |  |
1 Army | N Africa |
| Jul 43 |  |
Middle East Forces | N Africa |
| Sep 43 |  |
1 Army Group RA | Italy |
| Mar 45 |  |
2 Army | NW Europe |
+6
Batteries
| Jan 40 | A, B, C, D |
| Mar 42 | P, Q, R, S |
| Jan 43 | 15, 17, 18, 19 |
Equipment
| May 40 | 6 inch Guns & 9.2 inch Howitzers |
| Jul 40 | 6 inch Guns, 8 inch Howitzers & 9.2 inch Howitzers. 12 Scammell Tractors |
| Dec 42 | 7.2 inch Howitzer Mk4 |
| Sep 43 to 1945 | Scammel Gun Tractors |
7th County of London Brigade RFA