49 Anti-Aircraft Brigade served in London. They were in 1 Anti-Aircraft Division becoming 1 Anti-Aircraft Group when Divisions were abolished.
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.
| Aug 39 | SW1, London |  | 1 Anti-Aircraft Division |
| Oct 42 | London |  | 1 Anti-Aircraft Group |
| Jan 45 | Converted to HQ 305 Infantry Brigade | | |
| Jan 47 | Re-organised as 75 AA Brigade | | |
Order of Battle 1939
| 51 (London) Anti-Aircraft Regiment |
| 52 (London) Anti-Aircraft Regiment |
| 84 (Middlesex, London Transport) Anti-Aircraft Regiment |
Order of Battle 1941-42
| 53 (City of London) Heavy Anti-Aircraft Regiment – rejoined Jul 40, left for 6 Anti-Aircraft Division Oct 40 |
| 57 (Wessex) Heavy Anti-Aircraft Regiment – from Anti-Aircraft Division Autumn 41, to 11 Anti-Aircraft Division Jan 42 |
| 84 (Middlesex, London Transport) Heavy Anti-Aircraft Regiment– to 26 Anti-Aircraft Brigade Summer 41 |
| 86 (Honourable Artillery Company) Heavy Anti-Aircraft Regiment – from 26 Anti-Aircraft Brigade Mar 42 |
| 97 (London Scottish) Heavy Anti-Aircraft Regiment – from 48 Anti-Aircraft Brigade Autumn 41 |
| 109 Heavy Anti-Aircraft Regiment – formed Sep 40, to 48 Anti-Aircraft Brigade Dec 41, returned Jun 42 |
| 141 (Mixed) Heavy Anti-Aircraft Regiment – from 48 Anti-Aircraft Brigade Jan 42 |
| 11 (City of London Yeomanry) Light Anti-Aircraft Regiment – transferred to War Office Reserve Summer 41 |
| 36 Light Anti-Aircraft Regiment – to 8 Anti-Aircraft Division by May 41 |
| 42 Light Anti-Aircraft Regiment – from 11 Anti-Aircraft Division by May 41 |
| 70 Light Anti-Aircraft Regiment – formed Jan 41 |
| 73 Light Anti-Aircraft Regiment RA (TA)– formed Feb 41 |
