148 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was formed at Debden Manor, Hythe, Southampton in February 1942. The Regiment served in the UK in Anti-Aircraft Command for its entire existence. 148 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was disbanded in May 1945 at Perry Park, Birmingham.
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 | Southampton, Hampshire, UK | |
| Feb 42 |  |
5 Anti-Aircraft Division, 35 Anti-Aircraft Brigade | Southern England |
| Jun 42 | |
5 Anti-Aircraft Division, 5 Anti-Aircraft Brigade | Southern England |
| Nov 42 | |
5 Anti-Aircraft Division, 35 Anti-Aircraft Brigade | Southern England |
| Apr 43 |  |
1 Anti-Aircraft Group, 28 Anti-Aircraft Brigade | London, UK |
| Nov 44 | |
4 Anti-Aircraft Group, 34 Anti-Aircraft Brigade | North West England |
| May 45 | Disbanded | Birmingham, UK |
Batteries
| Feb 42 | 505 (Mixed), 508 (Mixed), 523 (Mixed) |
| Jun 42 | 505 (M), 508 (M), 523 (M), 529 (M) |
| Feb 43 | 624 (M), 628 (M), 629 (M) |
| Oct 43 | 624 (M), 628 (M), 629 (M), 631 (M), 633 (M) |
| Dec 43 | 624 (M), 629 (M), 631 (M), 633 (M) |