13 Heavy Anti-Aircraft Regiment RA was formed at Gibraltar in March 1941. During its life it had a mixture of Light Anti-Aircraft, Searchlight and Radar Batteries but only one Heavy Anti-Aircraft Battery. RHQ was disbanded in Gibraltar in December 1942.
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.
| Mar 41 | Formed with one Light Anti-Aircraft & one Searchlight Battery | Gibraltar | |
| Mar 41 |  |
Gibraltar Command | Gibraltar |
| Dec 42 | Disbanded |
Batteries
| Mar 41 | 114 LAA, 3 Searchlight |
| May 41 | 9 LAA, 114 LAA, 3 Searchlight, 228 |
| Oct 41 | 228, 3 Searchlight |
| Dec 41 | 228, 3 (Searchlight), 1 (Radio Direction Finder) |
| Nov 42 | 3 (Searchlight), 1 (Radio Direction Finder) |
| Dec 42 | RHQ only |