548 Coast Regiment RA was formed as 10 Coast Artillery Group RA at Clacton with four batteries, in October 1940. It was re-designated 548 Coast Regiment RA in June 1941. RHQ was disbanded in April 1944 with the batteries disbanding in June 1945.
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.
| Oct 40 | Formed as 10 Coast Artillery Group | Clacton, Essex, UK | |
| Oct 40 |  |
Eastern Command | Clacton, Essex, UK |
| Jun 41 | Became 548 Coast Regiment | ||
| Apr 44 | Disbanded |
Batteries
| Oct 40 | 330, 331, 372, 373 (West Mersea) |