3 Super Heavy Regiment RA was formed in November 1940 at Ashford, Kent with five batteries. The Regiment was disbanded in September 1945.
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.
| Nov 40 | Formed | Ashford, Kent, UK | |
| Nov 40 | Home Forces | Kent, UK | |
| Jun 44 |  |
2 Army | NW Europe |
| Oct 44 | |
9 AGRA | Belgium |
Batteries
| Nov 40 | 4, 13, X & Y RCA |
| Mar 41 | 4, 13, 15, 17 |
| Feb 42 | 4, 7, 13, 15, 17 |
| Mar 44 | 5, 7, 13, 15, 17 |
| Jul 44 | 5, 7, 13, 15 |
| Aug 44 | 4, 5, 7, 13, 15 |
| Sep 44 | 4, 5, 15 |
Equipment
| Nov 40 | 2 x 9.2 inch Rail Gun – 4 Battery, 1 gun at Hythe, 1 at Folkestone – Y Battery RCA, 1 gun at Bridge, Kent – X Battery RCA, 2 guns at Littlestone, Kent 12 & 18 inch Rail Howitzers 4 x 25 pdr |
| Jul 44 | 4 x 240mm Howitzers, 2 x 8 inch Guns, M6 Tractors |