145 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was formed at Hemlington, Middlesborough in January 1942. It became a non-mixed Regiment in August 1945. The Regiment served with Anti-Aircraft Command for its entire war. 145 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was considered a War Formed Regiment in January 1947 and re-designated as 106 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.
| Jan 42 | Formed | Middlesbrough, Yorkshire, UK | |
| Apr 42 |  |
7 Anti-Aircraft Division, 43 Anti-Aircraft Brigade | North East England |
| Oct 42 |  |
6 Anti-Aircraft Group, 43 Anti-Aircraft Brigade | North East England |
| Apr 43 | |
6 Anti-Aircraft Group, 36 Anti-Aircraft Brigade | Scotland |
Batteries
| Jan 42 | 500 (Mixed), 501 (Mixed), 502 (Mixed), |
| Jun 42 | 500 (Mixed), 501 (Mixed), 502 (Mixed), 536 (Mixed), |
| 1945 | 501 (M), 502 (M), 536 (M) |