56 (East Lancashire) Light Anti-Aircraft Regiment RA(TA) was formed as a duplicate of 52 (East Lancashire) Light Anti-Aircraft Regiment at Oswaldtwistle, in June 1939. The Regiment was placed in suspended animation in March 1945 and was re-constituted as 556 (East Lancashire) Heavy Anti-Aircraft Regiment RA(TA) in January 1947.
| Sep 39 | Home Forces | Oswaldtwistle, Lancashire, UK |
| Apr 40 | 6 Anti-Aircraft Brigade | Norway |
| Jun 40 | Home Forces | Dunfermline, Fife, UK |
| Jan 41 | 8 Support Group | UK |
| Jul 42 | 8 Support Group | N Africa |
| Jul 42 | 8 Armoured Division | N Africa |
| Nov 42 | 10 Corps, 8 Army | N Africa |
| May 43 | Allied Forces HQ | N Africa |
| Sep 43 | 8 Army | Italy |
| Apr 44 | 62 Anti-Aircraft Brigade | Italy |
| Mar 45 | Suspended animation |
Batteries
| Sep 39 | 166, 167, 168 |
Equipment
| Apr 40 | Bofors 40 mm |