511 (Durham) Coast Regiment RA(TA) was formed from a part of Durham Heavy Regiment RA(TA), in July 1940. RHQ was placed in suspended animation in March 1943 and the batteries went to 526 Coast Regiment RA(TA). It was reconstituted in January 1947 as 426 (Durham) Coast Regiment RA(TA).
| Jul 40 | Formed from part of Durham Heavy Regiment | Hartlepool, Co Durham, UK |
| Jul 40 | Home Forces | Hartlepool, Co Durham, UK |
| Dec 42 | Hartlepool Fire Command | Hartlepool, Co Durham, UK |
| Mar 43 | Suspended animation |
Batteries
| Jul 40 | A, B |
| Dec 40 | A, B, 315 |
| Apr 41 | 267, 268, 315 |
| Jun 41 | 139, 267, 315 |
| Jun 42 | 139, 267, 315 |
