89 Light Anti-Aircraft Regiment RA was formed in November 1941 by conversion of 11th Battalion The Buffs (Royal East Kent Regiment), with three batteries . The Regiment joined 49 Infantry Division in December 1942 and remained with them until the end of the war. They went to Normandy in June 1944. 89 Light Anti-Aircraft Regiment RA was disbanded in November 1945 .
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.
| Nov 41 | Formed from 11th Battalion The Buffs (Royal East Kent Regiment) | ||
| Nov 41 | Home Forces | UK | |
| Jan 42 |  |
2 Infantry Division | UK |
| Mar 42 | Home Forces | UK | |
| Dec 42 |  |
49 Infantry Division | Pembroke Dock, Pembrokeshire, UK |
| Jun 43 | |
49 Infantry Division | Rustington, Sussex, UK |
| Jun 43 | |
49 Infantry Division | Wakes Colne, Essex, UK |
| Jul 43 | |
49 Infantry Division | Stewarton, Ayrshire |
| Aug 43 | |
49 Infantry Division | Hove, Sussex, UK |
| Sep 43 | |
49 Infantry Division | Dumbarton, Dunbartonshire, UK |
| Dec 43 | |
49 Infantry Division | Great Yarmouth, Norfolk, UK |
| 12 Jun 44 | |
49 Infantry Division | Normandy, France |
| Jul 44 | |
49 Infantry Division | Vendes, France |
| Sep 44 | |
49 Infantry Division | Le Havre, France |
| Oct 44 | |
49 Infantry Division | Tilburg, Holland |
| Nov 44 | |
49 Infantry Division | Nijmegen, Holland |
| Nov 45 | Disbanded |
Batteries
| Nov 41 | 308, 309, 310 |