(Title authorised February 1942)
| 3 Sep 39 | 46 Infantry Division | Leeds, Yorkshire, UK |
| Apr 40 | 46 Infantry Division | France |
| Jun 40 | 46 Infantry Division | UK |
| Jul 40 | Home Forces | UK |
| Oct 41 | 10 Army | Iraq |
| Dec 41 | 10 Indian Division | Iraq |
| Jun 42 | 10 Indian Division | N Africa |
| Jul 42 | British Troops Egypt | N Africa |
| Sep 42 | 23 Armoured Brigade | N Africa |
| Oct 42 | 23 Armoured Brigade | Alamein, Egypt |
| Dec 42 | 8 Army | N Africa |
| Jul 43 | Middle East Forces | N Africa |
| Sep 43 | 8 Army | Salerno, Italy |
| Jan 44 | Became 121 Medium Regiment |
Batteries
| 3 Sep 39 | 275 (3rd West Riding), 276 (11th West Riding) |
| Feb 41 | 275, 276, 486 |
| Jun 42 | 275, 276 |
| Jun 43 | 161, 275, 276 |
| Jan 44 | 275, 276 |
Equipment
| Sep 42 | Valentine Observation Post Tanks |
| Oct 42 | 16 x 25 pdr Self Propelled Bishop |
