28 Anti-Aircraft Brigade was formed in 1925 as 28 Air Defence Brigade. It was re-titled in December 1935 as 28 (Thames & Medway) Anti-Aircraft Group. It served in South East England and East Anglia. 28 Anti-Aircraft Brigade was disbanded in March 1946.
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.
| 1925 | Tunbridge Wells – Formed as 28 Air Defence
Brigade |  | Eastern Command |
| Dec 35 | Chatham, Kent – 28 (Thames & Medway)
Anti-Aircraft Group |  | 1 Anti-Aircraft Division |
| Sep 39 | Kent – 28 (Thames & Medway)
Anti-Aircraft Brigade |  | 6 Anti-Aircraft Division |
| Oct 42 | London |  | 1 Anti-Aircraft Group |
| Dec 44 | East Anglia | | 9 Anti-Aircraft Group |
| May 45 | London | | 1 Anti-Aircraft Group |
| Mar 46 | Disbanded | | |
Order of Battle December 1935
| 55 (Kent) Anti-Aircraft Brigade (163, 166, 205 Batteries) |
| 58 (Kent) Anti-Aircraft Brigade (206, 207, 208 Batteries) |
| 61 (Finsbury Rifles) Anti-Aircraft Brigade (170, 171, 195, 272 Batteries) |
| 29 (Kent) Anti-Aircraft Battalion RE (TA) (313, 314, 322, 347 Batteries) |
| 32 (7th City of London) Anti-Aircraft Battalion RE (TA) (328, 329, 330, 331 Batteries) |
Order of Battle September 1939
| 55 (Kent) Anti-Aircraft Regiment (163, 166, 307, 308 Batteries) |
| 58 (Kent) Anti-Aircraft Regiment (206, 207, 208, 264 Batteries) |
| 75 (Home Counties)(Cinque Ports) Anti-Aircraft Regiment (223, 233, 306 Batteries) |
| 89 (Cinque Ports) Anti-Aircraft Regiment (205, 234, 235 Batteries) |
Order of Battle Winter 1940-41
| 55 (Kent) Heavy Anti-Aircraft Regiment |
| 58 (Kent) Heavy Anti-Aircraft Regiment |
| 75 (Home Counties)(Cinque Ports) Heavy Anti-Aircraft Regiment – Left November 1940 |
| 89 (Cinque Ports) Heavy Anti-Aircraft Regiment – Left September 1940 |
| 90 Heavy Anti-Aircraft Regiment – Joined November 1940 |
| 4 Light Anti-Aircraft Regiment – Joined November 1940 |
Order of Battle 1941-43
| 55 (Kent) Heavy Anti-Aircraft Regiment – Left Spring 1942 |
| 58 (Kent) Heavy Anti-Aircraft Regiment – Left Autumn 1941 |
| 59 (Essex Regiment) Heavy Anti-Aircraft Regiment – Joined Autumn 1941, left December 1941 |
| 60 (City of London) Heavy Anti-Aircraft Regiment – Joined October & left November 1942 |
| 72 (Hampshire) Heavy Anti-Aircraft Regiment – Joined January & left May 1942, re-joined October & left December 1942 |
| 76 (Gloucestershire) Heavy Anti-Aircraft Regiment – Joined June & left July 1942 |
| 85 (Tees) Heavy Anti-Aircraft Regiment – Joined Autumn 1941, left June 1942 |
| 90 Heavy Anti-Aircraft Regiment – Left July 1942 |
| 127 Heavy Anti-Aircraft Regiment – Joined Autumn 1941 & left June 1942, re-joined October 1942, left May 1943 |
| 128 (Kent) Heavy Anti-Aircraft Regiment – Joined November 1942, left April 1943 |
| 148 (Mixed) Heavy Anti-Aircraft Regiment – Joined April 1943 |
| 159 (Mixed) Heavy Anti-Aircraft Regiment – Joined October 1942, left October 1943 |
| 169 (Mixed) Heavy Anti-Aircraft Regiment – Joined October 1943 |
| 4 Light Anti-Aircraft Regiment – Left May 1942 |
| 16 Light Anti-Aircraft Regiment – Joined Spring 1941, left July 1941 |
| 43 Light Anti-Aircraft Regiment – Joined July & left December 1941 |
| 49 Light Anti-Aircraft Regiment – Joined June & left July 1942 |
| 69 Light Anti-Aircraft Regiment – Joined Spring 1941, left January 1942 |
| 129 (First Surrey Rifles) Light Anti-Aircraft Regiment – Joined June & left September 1942 |
| 132 Light Anti-Aircraft Regiment – Joined July 1942 |
| 143 Light Anti-Aircraft Regiment – Joined October 1942, left March 1943 |
| 12 (Mixed) AA Z Regiment – Joined January 1942, left November 1943 |
Order of Battle December 1943
| 148 (Mixed) Heavy Anti-Aircraft Regiment |
| 169 (Mixed) Heavy Anti-Aircraft Regiment |
| 132 Light Anti-Aircraft Regiment |
Order of Battle December 1944
| 129 (Mixed) Heavy Anti-Aircraft Regiment (444, 445, 454(M) Batteries) |
| 138 Heavy Anti-Aircraft Regiment (419, 424, 437 Batteries) from April 1945 |
| 141 (Mixed) Heavy Anti-Aircraft Regiment (486, 490, 493(M) Batteries) |
| 131 Light Anti-Aircraft Regiment (432, 433, 434 Batteries) |
Order of Battle May 1945
| 129 (Mixed) Heavy Anti-Aircraft Regiment (444, 445, 454(M) Batteries) |
| 141 (Mixed) Heavy Anti-Aircraft Regiment (486, 490, 493(M) Batteries) |
| 130 Light Anti-Aircraft Regiment (406, 407, 428 Batteries) from October 1945 |
