Converted to 2 (Cumberland Yeomanry) Army Brigade RFA (TF) from Westmorland & Cumberland Yeomanry (TF) in March 1920. In 1921 it became 93 (Westmorland & Cumberland Yeomanry) Brigade RFA (TA). It changed title again in June 1923 to 51 (Westmorland & Cumberland) Brigade RFA (TA). In June 1924 it became 51 (Westmorland & Cumberland) Field Brigade RA (TA). 51 Field Brigade was re-designated 51 (Westmorland & Cumberland) Field Regiment RA (TA) in November 1938 with two batteries. In October 1941 a third battery was formed but was absorbed into the other two batteries 3 months later. It amalgamated with 69 Light Anti-Aircraft/Anti-Tank Regiment in October 1943 as 51/69 Regiment RA(TA). This unit formed 51 and 69 Columns, 16 Infantry Brigade (Chindits). 51 (Westmorland & Cumberland) Field Regiment RA (TA) went into suspended animation in October 1944.
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 |  |
42 Infantry Division | Carlisle, Cumbria, UK |
| Apr 40 | Home Forces – 203 Battery to Norway | UK | |
| Jul 40 |  |
46 Infantry Division | UK |
| Sep 40 | Home Forces | UK | |
| Jan 41 |  |
British Troops Egypt | N Africa |
| May 41 | Tobruk Garrison | Tobruk, Libya | |
| Oct 41 |  |
8 Army | N Africa |
| Feb 42 | 34 Indian Division | Ceylon (Sri Lanka) | |
| Feb 43 |  |
70 Infantry Division | Ranchi, India |
| Oct 43 | Became 51 Column, Chindits | ||
| Oct 44 | Suspended animation as 51 Field Regiment |
Batteries
| 1921 | 369, 370 |
| Jun 23 | 203, 204, 369, 370 |
| Nov 38 | 203 (Cumberland), 370 (Cumberland Yeomanry) – 204 & 369 Batteries to 109 Field Regiment |
| Oct 41 | 203, 370, 436 |
| Jan 42 | 203, 370 (436 absorbed into other 2 batteries) |
| Mar 42 | 203, 370, 14 Heavy Anti-Aircraft Battery |
| Sep 42 | 14 Heavy Anti-Aircraft Battery to suspended animation |
Equipment
| Apr 40 | 203 Battery 25 pdr |
| 1941 | 18 pdr Gun + 4.5 Howitzer |
| Jul 41 | 12 x 25 pdr, 8 x 18 pdr |
| Feb 42 | 24 x 25 pdr |