516 (Thames & Medway) Coast Regiment RA (TA) was formed from a part of the Thames & Medway Heavy Regiment RA (TA), in July 1940. RHQ converted to 516 Garrison Regiment RA (TA) in December 1944 and as 614 Infantry Regiment RA (TA) in January 1945. RHQ 516 (Thames & Medway) Coast Regiment RA (TA) was placed in to suspended animation in July 1946 and was reconstituted as 415 (Thames & Medway) Coast 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.
| Jul 40 | Formed from part of Thames & Medway Heavy Regiment | ||
| Jul 40 |  |
Eastern Command | UK |
| Nov 41 | Sheerness Fire Command | Sheerness, Kent, UK | |
| Dec 44 | Became 516 Garrison Regiment RA(TA) |
Batteries
| Jul 40 | A, B, C, D |
| Dec 40 | A, B, C, D, 357 (Shornemead Fort) |
| Apr 41 | 220 (Sheerness), 284 (Grain Fort), 285 (Martello Bty), 286 (Whitehall Farm), 287 (Garrison Point), 288 (Garrison anti-MTB Bty) |
| Sep 41 | 220, 284, 285, 286, 287, 288, 289, 334 |
| Dec 41 | 220, 285, 286 (Canvey Island), 287, 288, 289, 334 |
| Mar 43 | 167, 220, 287, 288, 289, 334 |
| Apr 43 | 167, 220, 287 (Grain Fort), 288, 295, 334 |
| Jul 43 | 167, 220, 287 (Grain Fort), 288, 295, 334 – 3 Coast Observer Detachment |
| Apr 44 | 167, 168, 286, 287, 288, 295, 334 |
Equipment
| 2 x 5.5 inch Guns | Shornemead Fort | 357 Battery |
| 2 x 5.5 inch Guns | Coalhouse Fort | |
| 2 x 6 inch Guns | Grain Fort | 284 Battery (287 Bty from Apr 43) |