Formed in February 1920 as 1 Lowland Brigade Royal Field Artillery (TF). In 1921 it became 78 (Lowland) Brigade RFA (TA). It changed title again in June 1924 to 78 (Lowland) Field Brigade RA (TA). The Regiment was re-designated 78 (Lowland) Field Regiment RA (TA) from 78 Field Brigade in November 1938 on a two battery basis and as three batteries in March 1941. 78 (Lowland) Field Regiment RA (TA) was converted to 178 (Lowland) Medium Regiment RA (TA) in May 1944 and post war was re-constituted as 278 (Lowland) 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 |  |
52 Infantry Division | Edinburgh, UK |
| Jun 40 | |
52 Infantry Division | Cherbourg, France |
| Jun 40 | |
52 Infantry Division | London, UK |
| Nov 40 | |
52 Infantry Division, Scottish Command | Scotland, UK |
| Jun 42 |  |
War Office Reserve | UK |
| Oct 42 |  |
8 Army | Alamein, Egypt |
| Apr 43 | 4 Armoured Brigade Group | Tunisia | |
| Jul 43 | |
8 Army, 5 Army Group RA | Sicily |
| Sep 43 | |
8 Army | Italy |
| Jan 44 |  |
1 Infantry Division | Anzio, Italy |
| May 44 | Reformed as 178 Medium Regiment |
Batteries
| 1921 | 309, 310, 311, 312 |
| Nov 38 | 309 (1st City of Edinburgh), 310 (2nd City of Edinburgh) – 311 & 312 Batteries to 129 Field Regiment |
| Mar 41 | 309, 310, 456 |
Equipment
| Jun 40 | 25 pdr Guns |
| Sep 42 | Stuart Observation Post Tanks |