163 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was formed at Wimbledon in June 1942. The Regiment served with Anti-Aircraft Command in London for its entire existence. 163 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was considered a new War Formed unit in January 1947 and re-designated in the April as 101 (M) Heavy Anti-Aircraft Regiment RA.
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.
| Jun 42 | Formed | Wimbledon, London, UK | |
| Jun 42 |  |
1 Anti-Aircraft Division, 48 Anti-Aircraft Brigade | London, UK |
| Nov 44 |  |
1 Anti-Aircraft Group, 26 Anti-Aircraft Brigade | London, UK |
| Jan 45 | |
1 Anti-Aircraft Group, 48 Anti-Aircraft Brigade | London, UK |
Batteries
| Jun 42 | 350 (Mixed), 538 (Mixed), 553 (Mixed) |
| Sep 42 | 350 (M), 538 (M), 553 (M), 565 (M) |
| Sep 44 | 350 (M), 538 (M), 553 (M) |
| Mar 45 | 350 (M), 505 (M), 538 (M) |