Key
| Heavy Anti-Aircraft Site |  | Coast Battery |  |
| Airfield |  | Ordnance Factory |  |
| Site No. | Name | OS Grid Reference |
| O1 | Pembrey | SN 419 025 |
| O2 | Gilian Gwyn | SN 499 035 |
Heavy AA Regiments known to have occupied sites in this GDA
| Dates | Units |
| Jul – Aug 40 | 85 (Tees) Heavy Anti-Aircraft Regiment |