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). 511 (Durham) Coast Regiment RA (TA) was reconstituted in January 1947 as 426 (Durham) Coast Regiment RA (TA).
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 Durham Heavy Regiment | Hartlepool, Co Durham, UK | |
| Jul 40 |  |
Northern Command | Hartlepool, Co Durham, UK |
| Jan 42 |  |
9 Corps | Hartlepool, Co Durham, UK |
| Dec 42 | Hartlepool Fire Command | Hartlepool, Co Durham, UK | |
| Mar 43 | Suspended animation |
Batteries
| Jul 40 | A (Hartlepool), B (Hartlepool) |
| Dec 40 | A, B, 315 (Seaton Carew) |
| Apr 41 | 267 (Heugh Lighthouse), 268 (Hartlepool Old Pier), 315 |
| Jun 41 | 139 (Heugh Lighthouse), 267, 315 |
| Jun 42 | 139, 267, 315 |