170 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was formed at Johnstone in August 1942. The Regiment served with Anti-Aircraft Command for the whole of its existence. 170 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was disbanded in March 1945 at Coombe Abbey, Coventry.
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.
| Aug 42 | Formed | Johnstone, Renfrewshire, UK | |
| Aug 42 |  |
6 Anti-Aircraft Group, 42 Anti-Aircraft Brigade | Glasgow, UK |
| Apr 43 | |
6 Anti-Aircraft Group, 30 Anti-Aircraft Brigade | North East England |
| Jan 44 | |
4 Anti-Aircraft Group, 34 Anti-Aircraft Brigade | West Midlands, UK |
| Mar 45 | Disbanded | Coventry, West Midlands, UK |
Batteries
| Sep 42 | 528 (Mixed), 547 (Mixed), 554 (Mixed), 567 (Mixed), 568 (Mixed) |
| Oct 42 | 528 (M), 554 (M), 567 (M), 568 (M) |
| Feb 44 | 528 (M), 554 (M), 567 (M) |
| Dec 44 | 554 (M), 567 (M) |