122 Heavy Anti-Aircraft Regiment RA(TA) was formed at Edgbaston in February 1941. The Regiment was disbanded in October 1945.
| Feb 41 | Formed | Edgbaston, Birmingham, UK |
| Feb 41 | 34 Anti-Aircraft Brigade, 11 Anti-Aircraft Division | Birmingham, UK |
| Dec 41 | 67 Anti-Aircraft Brigade, 11 Anti-Aircraft Division | Birmingham, UK |
| Dec 41 | 68 Anti-Aircraft Brigade, 11 Anti-Aircraft Division | Birmingham, UK |
| Jul 42 | Unbrigaded | UK |
| ?? | Orkney & Shetland Defences (OSDEF) | Orkney, UK |
| Feb 44 | 30 Anti-Aircraft Brigade, 6 Anti-Aircraft Group | UK |
| May 44 | 3 Anti-Aircraft Group | UK |
| Aug 44 | 102 Anti-Aircraft Brigade, 2 Anti-Aircraft Group | South coast, England |
| Sep 44 | ?? | UK |
| Mar 45 | 5 Anti-Aircraft Brigade, 9 Anti-Aircraft Group | East Anglia, UK |
Batteries
| Feb 41 | 397, 400, 401 |
| Feb 44 | 397, 400, 401, 453 |
| May 44 | 397, 400, 401 |
