The original 9 Medium Brigade was disbanded in November 1922. 9 Medium Regiment RA was formed in December 1942 from 8th Battalion The Buffs (Royal East Kent Regiment). It was organised with two batteries. The Regiment went to Normandy in June 1944 with 9 AGRA. In November 1945, 9 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 8th Battalion The Buffs | UK | |
| Jan 43 | Home Forces | Boston, Lincolnshire, UK | |
| Apr 43 | Home Forces | Grantham, Lincolnshire, UK | |
| Jul 43 |  |
9 Army Group RA, 2 Corps | Grantham, Lincolnshire, UK |
| Aug 43 | 9 Army Group RA | Daventry, Northamptonshire, UK | |
| Oct 43 |  |
21 Army Group, 9 Army Group RA | Felixstowe, Suffolk, UK |
| Nov 43 | |
21 Army Group, 9 Army Group RA | Hove, Sussex, UK |
| Apr 44 | |
21 Army Group, 9 Army Group RA | Bingley, Yorkshire, UK |
| Jun 44 | |
21 Army Group, 9 Army Group RA | New Milton, Hampshire, UK |
| 14 Jul 44 | |
21 Army Group, 9 Army Group RA | Graye sur Mer, France |
| Jul 44 |  |
12 Corps, 9 Army Group RA | St Manvieu, France |
| Jul 44 |  |
2 Canadian Corps, 9 Army Group RA | Giberville, France |
| Aug 44 | |
2 Canadian Corps, 9 Army Group RA | Cintheaux, France |
| Sep 44 |  |
1 Canadian Army, 9 Army Group RA | Le Havre, France |
| Sep 44 | |
2 Canadian Corps, 9 Army Group RA | Bellebrune, France |
| Sep 44 | |
2 Canadian Corps, 9 Army Group RA | Audembert, France |
| Oct 44 | |
2 Canadian Corps, 9 Army Group RA | Kaprijke, Belgium |
| Oct 44 | |
2 Canadian Corps, 9 Army Group RA | Ijzendijke, Holland |
| Oct 44 | |
2 Canadian Corps, 9 Army Group RA | Klousterzande, Holland |
| Oct 44 | |
2 Canadian Corps, 9 Army Group RA | Slijkplaat, Holland |
| Nov 44 | |
12 Corps, 9 Army Group RA | Budel, Holland |
| Nov 44 | |
12 Corps, 9 Army Group RA | Ell, Holland |
| Nov 44 | |
12 Corps, 9 Army Group RA | Houthuijzen, Holland |
| Nov 44 | |
12 Corps, 9 Army Group RA | Rinkesfort, Holland |
| Dec 44 |  |
30 Corps, 5 Army Group RA | Grotenrath, Germany |
| Jan 45 | |
30 Corps, 9 Army Group RA | Brunssum, Germany |
| Jan 45 | |
30 Corps, 9 Army Group RA | Langbroich, Germany |
| Feb 45 | |
1 Canadian Army, 9 Army Group RA | Haps, Holland |
| Feb 45 | |
12 Corps, 9 Army Group RA | Oeffelt, Holland |
| Feb 45 | |
12 Corps, 9 Army Group RA | South Gennep, Holland |
| Mar 45 | |
12 Corps, 9 Army Group RA | Hassum, Germany |
| Mar 45 | |
12 Corps, 9 Army Group RA | Veen, Holland |
| Mar 45 | |
12 Corps, 9 Army Group RA | Werrich, Germany |
| Oct 45 | Disbanded |
Batteries
| 1942 | 81, 82 |
Equipment
| Apr 43 | 16 x 5.5 inch Guns |
| Nov 43 | Covenantor Tank Observation Post |
| Jun 45 | Guns handed in |