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 was disbanded in November 1945 .
| 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 |
| Jun 44 | 49 Infantry Division | NW Europe |
| Nov 45 | Disbanded |
Batteries
| Nov 41 | 308, 309, 310 |
