556 Coast Regiment RA was formed as 18 Coast Artillery Group RA at Torquay with six batteries, in October 1940. It was re-designated 556 Coast Regiment RA in June 1941. The Regiment was disbanded 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 18 Coast Artillery Group | Torquay, Devon, UK | |
| Oct 40 |  |
Southern Command | Torquay, Devon, UK |
| Jun 41 | Became 556 Coast Regiment | Torquay, Devon, UK | |
| Nov 42 | Home Forces | Totnes, Devon, UK | |
| Jun 45 | Disbanded | Exmouth, Devon, UK |
Batteries
| Oct 40 | 361, 362, 363 (Brixham), 378, 390, 391 (Salcombe) |
| May 42 | 361, 362, 363 (Corbyn’s Head), 391, 399 |
| Aug 42 | 361, 363, 378, 391, 399 |
| Apr 44 | 361, 362, 363, 364, 377 (Exmouth), 378, 389 (Connaught Gardens), 391, 395, 399, 402 |