125 Heavy Anti-Aircraft Regiment RA (TA) was formed at the Royal Artillery Depot in Woolwich in May 1941. The Regiment was disbanded in December 1941 in the Middle East without ever having batteries assigned.
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.
| May 41 | Formed | Woolwich, London, UK | |
| May 41 | Home Forces | UK | |
| Oct 41 |  |
Middle East Forces | Beni Yusuf, N Africa |
| Nov 41 | |
Middle East Forces | Abassia, Egypt |
| Dec 41 | Disbanded – no batteries ever posted |