543 Coast Regiment RA was formed as 3 Coast Artillery Group RA at Dundee with two batteries, in October 1940. It was re-designated 543 Coast Regiment RA in June 1941. RHQ was disbanded in April 1944 with 242 Battery placed in suspended animation and 143 & 303 Batteries joining 4 Coast Training Regiment RA.
| Oct 40 | Formed as 3 Coast Artillery Group | Dundee, UK |
| Jun 41 | Became 543 Coast Regiment | Dundee, UK |
| Apr 44 | Disbanded |
Batteries
| Oct 40 | 307, 308 |
| Apr 41 | 244, 307, 308 |
| Jul 41 | 143, 244, 307 |
| Mar 42 | 143, 242, 303 |
