151 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was formed in Ellesmere Park, Eccles in February 1942. It became a non-mixed Regiment in February 1946. The Regiment served in Anti-Aircraft Command for the whole of its existence. 151 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was considered a War Formed Regiment in January 1947 and re-designated as 109 Heavy Anti-Aircraft Regiment RA in April that year.
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.
| Feb 42 | Formed | Eccles, Greater Manchester, UK | |
| May 42 |  |
4 Anti-Aircraft Division, 44 Anti-Aircraft Brigade | North West England |
| Jul 42 |  |
5 Anti-Aircraft Division, 35 Anti-Aircraft Brigade | Portsmouth, Hampshire, UK |
| ?? |  |
5 Anti-Aircraft Group, 63 Anti-Aircraft Brigade | East Anglia |
| Jul 44 | |
5 Anti-Aircraft Group, 41 Anti-Aircraft Brigade | East Anglia, UK |
| Aug 44 | |
5 Anti-Aircraft Group, 30 Anti-Aircraft Brigade | Eastern England |
Batteries
| Mar 42 | 510 (Mixed), 511 (Mixed), 514 (Mixed), 516 (Mixed) |
| Feb 45 | 511 (Mixed), 514 (Mixed), 516 (Mixed) |
Gun Sites Occupied
Site-*/*= old site/new site
510 Battery
| Dates | Gun Site | Gun Defended Area |
| Sep 42 | J/H9 Stone Creek | Humber |
514 Battery
| Dates | Gun Site | Gun Defended Area |
| Jul 42 | H31 | Humber |