The unit was formed as 1 Welsh Brigade Royal Field Artillery (TF) in February 1920 at Swansea. It became 81 (Welsh) Brigade RFA (TA) in 1921. The Brigade changed title again in June 1924 to 81 (Welsh) Field Brigade Royal Artillery (TA). 81 (Welsh) Field Brigade was re-designated 81 (Welsh) Field Regiment RA (TA) in November 1938 with two batteries. In December 1940 a third battery was formed. Post war 81 (Welsh) Field Regiment RA (TA) went into suspended animation in June 1946 and was re-constituted as 281 (Welsh) Field 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.
| 3 Sep 39 |  |
53 Infantry Division | Port Talbot, West Glamorgan, UK |
| Oct 39 | |
53 Infantry Division | Northern Ireland, UK |
| Apr 41 | |
53 Infantry Division, Western Command | UK |
| May 43 | |
53 Infantry Division, 21 Army Group | UK |
| Jun 44 | |
53 Infantry Division | Normandy, France |
| Sep 44 | |
53 Infantry Division | Lille, France |
| Oct 44 | |
53 Infantry Division | Nijmegen, Holland |
| Jan 45 | |
53 Infantry Division | Eindhoven, Holland |
| Feb 45 | |
53 Infantry Division | Goch, Germany |
| May 45 | |
53 Infantry Division | River Elbe, Germany |
Batteries
| 1921 | 321, 322, 323, 324 |
| Nov 38 | 323 (Glamorgan), 324 (Glamorgan) – 321 7 322 Batteries to 132 Field Regiment |
| Jan 41 | 323, 324, 459 |