10 Medium Regiment RA was formed in December 1942 from 16th Battalion The Royal Fusiliers (City of London Regiment). It was organised with two batteries. The Regiment went to France in 1944 as part of the 9 Army Group RA. In April 1946, 10 Medium Regiment RA was disbanded.
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.
| Dec 42 | Formed from 16th Battalion The Royal Fusiliers | UK | |
| Dec 42 | Home Forces | UK | |
| May 44 |  |
21 Army Group | UK |
| Jun 44 | |
21 Army Group, 9 Army Group RA | NW Europe |
| Jun 44 |  |
30 Corps, 5 Army Group RA | NW Europe |
| Aug 44 | |
21 Army Group, 9 Army Group RA | NW Europe |
| Dec 44 |  |
2 Canadian Army Group RA | NW Europe |
| May 45 | |
30 Corps, 5 Army Group RA | NW Europe |
Batteries
| Dec 42 | P, Q |
| Jan 43 | 83, 84 |