549 Coast Regiment RA was formed as 11 Coast Artillery Group RA at Canterbury with seven batteries, in October 1940. It was re-designated 549 Coast Regiment RA in June 1941. RHQ was disbanded in June 1945 with 185 Battery joining 519 Coast Regiment RA (TA), 296 Battery going to suspended animation and the remainder disbanding.
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 11 Coast Artillery Group | Canterbury, Kent, UK | |
| Oct 40 |  |
Eastern Command | Canterbury, Kent, UK |
| Jun 41 | Became 549 Coast Regiment | Kent, UK | |
| Jun 45 | Disbanded | Ramsgate, Kent, UK |
Batteries
| Oct 40 | 333, 335, 336 (Ramsgate), 337, 408, 410, 413 |
| Apr 41 | 333, 335, 336, 408, 410, 413 |
| May 41 | 230 (Dumpton Point), 297, 333, 335, 336, 408 (Knuckle), 410, 413 |
| Oct 41 | 230, 297, 335, 408, 410, 413, 415, 416 (Ramsgate) |
| Jun 42 | 297, 339, 341, 358, 408, 411, 415, 416 |
| Aug 42 | 297, 339, 341, 358, 411, 415, 416 |
| Feb 43 | 297, 333, 336, 339, 341, 358, 411 |
| May 43 | 185, 297, 333, 336, 339, 341, 358, 411 |
| Apr 44 | 185, 234, 236, 296, 297, 333, 336, 338, 339, 341, 358, 411 |
| Feb 45 | 185, 234, 236, 296, 333, 336, 338, 339, 341, 358, 411 |