58 (Suffolk) Medium Regiment RA(TA) was re-designated from 58 Medium Brigade with two batteries in November 1938. The Regiment was placed in suspended animation in March 1946 and reconstituted as 358 (Suffolk) Medium Regiment RA(TA) in January 1947.
| Nov 38 | Eastern Command | Ipswich, Suffolk, UK |
| Oct 39 | Home Forces | Borden, Hampshire, UK |
| Dec 39 | Home Forces | Kingsley, Hampshire, UK |
| Jan 40 | British Expeditionary Force | France |
| May 40 | Under command 50 Division | Aix Noulette, France |
| May 40 | HQ Medium Artillery 3 Corps | Oudenarde, Belgium |
| 25 May 40 | HQ Medium Artillery 3 Corps | Wervicq, France 26 May ordered to destroy remaining guns and withdraw to Dunkirk. |
| Jun 40 | Home Forces | Southborne, Dorset, UK |
| Jul 40 | Home Forces | Newbury, Berkshire, UK |
| Dec 42 | 1 Army | N Africa |
| Jul 43 | Allied Forces HQ | N Africa |
| Sep 43 | 1 Army Group RA | Italy |
Batteries
| Nov 38 | 229, 230 (Suffolk) |
Equipment
| Jan 40 | 6 inch Howitzers (iron wheels), Scammell tractors |
