11 Heavy Anti-Aircraft Regiment Royal Malta Artillery was formed in September 1939 with two batteries. By June 1940, the batteries were located at: 20 Battery, Delimara; 21 Battery, Tal Krok. Further batteries were added in 1940 with 22 Battery, Ricasoli; 30 Battery (Dockyard Defence Battery). There were further changes later. In May 1945, RHQ was placed in suspended animation at Fort St Elmo. The Regiment was re-formed at Hompesch in October 1952 as 11 Heavy Anti-Aircraft Regiment Royal Malta Artillery (T).
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.
| Sep 39 | Formed as 11 Anti-Aircraft Regiment Royal Malta Artillery | Malta | |
| Sep 39 |  |
Malta Command | Malta |
| Jun 40 | Became 11 Heavy Anti-Aircraft Regiment RMA | Malta | |
| May 41 |  |
10 Anti-Aircraft Brigade | |
| May 45 | Suspended animation |
Batteries
| Sep 39 | 20, 21 |
| Sep 40 | 20, 21, 22 LAA, 30 LAA |
| Mar 41 | 20, 21, 23 |
| Nov 43 | 5, 20, 21, 23 |