51 (Midland) Medium Regiment RA (TA) was re-designated from 51 Medium Brigade with two batteries in November 1938. The Regiment went to suspended animation in April 1946. 51 (Midland) Medium Regiment RA (TA) was reconstituted as 351 (Midland) Medium 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.
| Nov 38 |  |
Western Command | Stoke on Trent, Staffordshire, UK |
| Oct 39 |  |
3 Corps | France |
| Jun 40 | Arkforce | France | |
| Jun 40 | Home Forces | UK | |
| Dec 42 |  |
Middle East Forces | N Africa |
| Sep 43 |  |
2 Army Group RA | Salerno, Italy |
| Oct 43 |  |
56 Infantry Division | Capua, Italy |
| Nov 43 | |
1 Army Group RA | Castel Bordino, Italy |
| Dec 43 |  |
10 Corps | Monte Camino, Italy |
| Jan 44 | |
56 Infantry Division | Rongolise, Italy |
| Feb 44 |  |
1 Army Group RA | Italy |
| May 44 | |
Middle East Forces | N Africa |
| Jul 44 |  |
8 Army | Italy |
| Feb 45 |  |
21 Army Group | NW Europe |
Batteries
| Sep 39 | 215 (Staffordshire), 240 (Shropshire Horse Artillery) |
Equipment
| Sep 39 | 6 inch Howitzers (iron tyres) |
| Aug 40 | 2 x 4 inch Guns at Burry Port, LLanelli (No.13 Emergency Battery) |
| Nov 40 | Guns handed over to 402 Coast Battery |