18 Anti-Aircraft Z Regiment RA formed in October 1942 at Meridan Hall, Coventry with two batteries. The Regiment disbanded in April 1945.
| Oct 42 | Formed | Coventry, West Midlands, UK | |
| Oct 42 |  |
4 Anti-Aircraft Group, 34 Anti-Aircraft Brigade | West Midlands, UK |
| Apr 44 | |
Became 18 Anti-Aircraft Area Mixed Regiment | Knowle, Birmingham, UK |
| Apr 45 | Disbanded |
Batteries
| Oct 42 | 133, 200 |
| Dec 42 | 116, 133, 199, 200 |
Batteries manned by Home Guard
Battery |
Home Guard Unit |
Date from |
| 116 Battery | 103 Warwickshire (Mixed) | Nov 42 |
| 133 Battery | 104 Warwickshire (Mixed) | Nov 42 |
| 199 Battery | 105 Warwickshire (Mixed) | Jul 42 |
| 200 Battery | 106 Warwickshire (Mixed) | Jul 42 |