70 Anti-Aircraft Brigade was formed in June 1941. It served in 4 Anti-Aircraft Division in North West England. In October 1942, 70 Anti-Aircraft Brigade became part of 4 Anti-Aircraft Group. In May 1943 it was redesignated 104 Anti-Aircraft Brigade.
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.
| Jun 41 | North West |  | 4 Anti-Aircraft Division |
| Oct 42 | North West |  | 4 Anti-Aircraft Group |
| May 43 | Redesignated 104 AA Brigade |
Order of Battle 1941-42
| 62 (Northumbrian) Heavy Anti-Aircraft Regiment (172, 173, 266 Batteries) – joined Apr 42, left Jul 42 |
| 81 Heavy Anti-Aircraft Regiment (253, 254, 255 Batteries) – Left Apr 42 |
| 117 Heavy Anti-Aircraft Regiment (369, 370, 371, 392 Batteries) – Joined Dec 41, left May 42 |
| 131 (Mixed) Heavy Anti-Aircraft Regiment (310, 368, 376, 428 Batteries) – Joined Aug 42 |
| 63 Light Anti-Aircraft Regiment (188, 189, 190 Batteries) – Joined Jul 42, left Aug 42 |
| 76 Light Anti-Aircraft Regiment (226, 227, 228 Batteries) – Left Feb 42 |
| 114 Light Anti-Aircraft Regiment (372, 373, 374, 375 Batteries) – Joined Jan left Jun 42 |
| 92 Searchlight Regiment (556, 557, 558 Batteries) |
| 4 Anti-Aircraft Regiment Z Regiment (104, 132, 135, 139, 172 Batteries) – Joined Summer, left Autumn 41 |