1 Anti-Aircraft Brigade was formed in 1920. Its name was soon changed to 1 AA Group as the RA were still using the term Brigade for what was later to become Regiment for a Lt Col’s command. On the change to Regiment 1 AA Group became 1 Anti-Aircraft Brigade. The Brigade went to France with the BEF joining AA Command on its return to the UK. It moved to the Middle East in January 1942 and spent the rest of the war there.
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.
| Dec 20 | Aldershot, Hampshire – as 1 Air Defence Brigade
then 1 AA Group | | Aldershot Command |
| 1939 | Became 1 Anti-Aircraft Brigade | | |
| Sep 39 | B.E.F. Arras, France | | GHQ B.E.F. |
| Jun 40 | Crewe, Cheshire |  | 11 Anti-Aircraft Division |
| May 41 | |  | War Office Reserve |
| Jan 42 | Palestine |  | 9 Army |
| Aug 42 | Egypt |  | 8 Army |
| Jan 43 | Benghazi, Libya | | 8 Army |
| May 43 | Benghazi, Libya | | AA Defence Area Cyrenaica |
| Jan 44 | The Levant | | Middle East AA Group |
| Jun 44 | The Levant & Cyprus | | Middle East AA Group |
| 1947 | Reformed in 1 AA Group | | |
Order of Battle 1 AA Group
| 1 Anti-Aircraft Brigade (1, 2 & 3 AA Batteries) Royal Garrison Artillery |
| 1 Anti-Aircraft Searchlight Battalion Royal Engineers |
| Air Defence Brigade Signals Royal Signals |
Order of Battle September 1939
| 6 Anti-Aircraft Regiment RA (3, 12 & 15 AA Batteries) |
| 1 Light Anti-Aircraft Battery RA |
| 1 Anti-Aircraft Battalion RE (A & B Searchlight Batteries) |
| 1 & 2 Anti-Aircraft Brigade Signals R Sigs |
Order of Battle May 1940
| 1 Anti-Aircraft Regiment RA (1, 2 & 17 Batteries) |
| 6 Anti-Aircraft Regiment RA (3, 12 & 15 Batteries) |
| 85 (Tees) Anti-Aircraft Regiment RA (174, 175 & 220 Batteries) |
Order of Battle 1940-41
| 1 Heavy Anti-Aircraft Regiment (1, 2, 17 Batteries) |
| 106 Heavy Anti-Aircraft Regiment (327, 331, 332 Batteries) |
| 45 Light Anti-Aircraft Regiment (102, 135 & 142 Batteries) |
| 63 Light Anti-Aircraft Regiment (188, 189 & 190 Batteries) |
| 61 (South Lancashire) Searchlight Regiment (432, 433, 434 Batteries) |
| 78 Searchlight Regiment (498, 499, 500, 551 Batteries) |
| 83 Searchlight Regiment (513, 514, 515 Batteries) |
Order of Battle January 1943
| 51 (London) Heavy Anti-Aircraft Regiment (152, 153 & 242 Batteries) |
| 69 (R Warks Rgt) Heavy Anti-Aircraft Regiment (192, 199, 200 HAA & 135 Z Batteries) |
| 89 (Cinque Ports) Heavy Anti-Aircraft Regiment (to relieve 51 HAA Rgt) |
| 2 Light Anti-Aircraft Regiment (6, 155, 171 (from 57 LAA) & 390 Searchlight Batteries) |
| 37 (Tyne Electrical Engineers) Light Anti-Aircraft Regiment (123, 124 & 222 Batteries) |
| 57 (KOYLI) Light Anti-Aircraft Regiment (169 & 170 Batteries)(on loan from 4 Indian Div) |
Order of Battle May 1943
| 89 (Cinque Ports) Heavy Anti-Aircraft Regiment |
| 28 Battery, 9 Heavy Anti-Aircraft Regiment |
| 1 Troop, 135 Z Anti-Aircraft Battery |
| 13 Light Anti-Aircraft Regiment |
| 96 Light Anti-Aircraft Regiment |
| 390 Battery, 27 Searchlight Regiment |
| 2 x AA Operations Rooms |
Order of Battle January 1944
| 74 (City of Glasgow) Heavy Anti-Aircraft Regiment |
| 102 Heavy Anti-Aircraft Regiment |
| 16 Light Anti-Aircraft Regiment |
| 37 Light Anti-Aircraft Regiment |
| 80 Light Anti-Aircraft Regiment |
| 390 Searchlight Battery |
Order of Battle June 1944
| 2 Heavy Anti-Aircraft Regiment |
| 1 Heavy Anti-Aircraft Regiment Hong Kong-Singapore RA |
| 181 Battery, 65 Heavy Anti-Aircraft Regiment |
| 257 Battery, 83 Heavy Anti-Aircraft Regiment |
| 37 Light Anti-Aircraft Regiment |
| 243 Battery, 46 Light Anti-Aircraft Regiment |
| 1 Palestine Independent Light Anti-Aircraft Battery |
| 219 Independent Light Anti-Aircraft Battery |
| 390 Searchlight Battery |
