174 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was formed at Burlesdon near Southampton in October 1942. The Regiment served in Anti-Aircraft Command until May 1943 when it transferred to 21 Army Group. 174 (Mixed) Heavy Anti-Aircraft Regiment RA (TA) was disbanded in February 1946 in North West Europe.
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.
| Oct 42 | Formed | Southampton, Hampshire, UK | |
| Oct 42 |  |
2 Anti-Aircraft Group, 5 Anti-Aircraft Brigade | South Coast, England |
| Apr 43 | |
2 Anti-Aircraft Group, 38 Anti-Aircraft Brigade | South Coast, England |
| May 43 |  |
21 Army Group | UK |
| Aug 44 | |
21 Army Group, 105 Anti-Aircraft Brigade | Normandy, France |
| Oct 44 | |
21 Army Group, 105 Anti-Aircraft Brigade | South Scheldt, Belgium |
Batteries
| Oct 42 | 249 (Mixed), 331 (Mixed), 348, (Mixed) |