5 Anti-Aircraft Z Regiment RA was formed in September 1940 with four batteries in 5 Anti-Aircraft Division. The Regiment served mostly in Hampshire. 5 Anti-Aircraft Z Regiment RA was re-organised in April 1945 as 2 Area Anti-Aircraft Maintenance HQ.
| Sep 40 | Formed | ||
| Sep 40 |  |
5 Anti-Aircraft Division, 35 Anti-Aircraft Brigade | South East England |
| Oct 42 |  |
2 Anti-Aircraft Group, 35 Anti-Aircraft Brigade | South East England |
| Oct 43 | |
6 Anti-Aircraft Group, 35 Anti-Aircraft Brigade | South East England |
| Apr 44 | |
Became 5 Anti-Aircraft Area Mixed Regiment | South East England |
| Jan 45 | Batteries disbanded | ||
| Apr 45 | Became 2 Area Anti-Aircraft Maintenance HQ | Fort Fareham, Hampshire, UK |
Batteries
| Sep 40 | 101, 102, 114, 123 |
| Jan 41 | 102, 114 |
| Aug 41 | 102, 112, 114, 127 |
| Dec 42 | 102, 112, 114, 127, 194, 198 |
| Sep 43 | 102, 112, 114, 127 |
| Dec 43 | 102, 112, 127 |
Batteries manned by Home Guard
| Battery | Home Guard Unit | Date from |
| 102 Battery | 103 Hampshire (Mixed) | Nov 42 |
| 112 Battery | 104 Hampshire (Mixed) | Nov 42 |
| 114 Battery | 102 Hampshire (Mixed) | Nov 42 |
| 127 Battery | 101 Hampshire (Mixed) | Nov 42 |
| 198 Battery | 101 Berkshire (Mixed) | Jul 42 |