103 Light Anti-Aircraft Regiment RA was converted in December 1941 from 7th Battalion The East Lancashire Regiment. The Regiment served entirely in the UK and was broken up to provde reinforcements for units going to Normandy. 103 Light Anti-Aircraft Regiment RA was disbanded in March 1944.
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.
| Dec 41 | Formed from 7th Battalion East Lancashire Regiment |
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| Dec 41 | Home Forces | UK | |
| Feb 42 |  |
55 Infantry Division | Northern Command, UK |
| Nov 42 |  |
61 Infantry Division | Northern Ireland, UK |
| Feb 43 | |
61 Infantry Division, 11 Corps | Essex, UK |
| May 43 | |
61 Infantry Division, 2 Corps | East Anglia, UK |
| May 43 | |
61 Infantry Division, 21 Army Group | UK |
| Mar 44 | Disbanded |
Batteries
| Dec 41 | 339, 340, 341 |