110 Heavy Anti-Aircraft Regiment RA (TA) was formed in Anglesey in October 1940. The Regiment served in Anti-Aircraft Command until transferring to 21 Army Group in December 1943. It moved to France in September 1944 as part of 103 Anti-Aircraft Brigade and served with them to the end of the war. 110 Heavy Anti-Aircraft Regiment RA (TA) was disbanded in February 1946.
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 40 | Formed | Anglesey, Gwynedd, UK | |
| Oct 40 |  |
11 Anti-Aircraft Division, 34 Anti-Aircraft Brigade | UK |
| May 41 |  |
Orkney & Shetland Defences (OSDEF) | Orkney, UK |
| Dec 43 |  |
21 Army Group, 103 Anti-Aircraft Brigade | Cornwall, UK |
| Mar 44 | |
21 Army Group, 103 Anti-Aircraft Brigade | Wiltshire, UK |
| Jun 44 | |
21 Army Group, 103 Anti-Aircraft Brigade | Essex, UK |
| Sep 44 | |
21 Army Group, 103 Anti-Aircraft Brigade | Le Havre, France |
| Oct 44 | |
21 Army Group, 103 Anti-Aircraft Brigade | Dieppe, France |
| Mar 45 | |
21 Army Group, 103 Anti-Aircraft Brigade | Antwerp, Belgium |
Batteries
| Nov 40 | 345, 346, 348, 354 |
| Sep 41 | 339, 345, 346, 348, 354 |
| Feb 42 | 345, 346, 348, 354 |
| Oct 42 | 345, 346, 354 |