The escorts were able to drive this attack off, destroying U-70 in the process. She made an attack on a contact, an attack which was believed to have resulted in the destruction of ; this assessment was revised later, and Wolverine is believed to have hit , which escaped with damage. HMS Wolverine had made an earlier attack on a submarine at 0510hrs 7 March 1941, 5 minutes after U-47's last known torpedo attack on the Whale Factory Ship, Terje Viken. Nothing further was heard from U-47 after this time. In April 1941 Wolverine deployed with and , the escort force for Convoy SC 26. Under sustained attacks by U-46, U-74 and U-73 six ships were sunk and several others were damaged. On 5 April, after sonar contact was made, Wolverine and Scarborough depth-charged to the surface. U-76 sank by the stern after her crew was rescued. In February 1942 Wolverine was converted to a short-range escort (SRE). To augment the earlier changes, the replacement of the after bank of torpedo tubes with a single QF 12-pounder 12 cwt naval gun and the landing of 'Y' gun for additional space for depth charge gear and stowage, the 2-pounder "pompoms" were replaced with two Oerlikon 20 mm cannons amidships and the 'A' gun was replaced with a Hedgehog anti-submarine mortar. A Type 271 target indication radar was added on the bridge to augment the Type 286M air warning radar. In April she undertook training and practice under her new captain, Commander P W Gretton (promoted to rear admiral and knighted after the war). In July she moved to Gibraltar for operations in the Mediterranean. In August Wolverine took part in Operation Pedestal. While escorting she detected a submarine on the surface. She carried out a ramming attack and sank submarine . She suffered major bow damage and her port turbine was disabled. She returned to Gibraltar under her own power for temporary repair, followed by several months in dock at Devonport. During her stay at Gibraltar she escorted six Gibraltar and six South Atlantic convoys, three of which were attacked. After repairs completed in December she was employed in Western Approaches convoy defence duties. She served mainly on local escort assignments until her transfer to Freetown, South Africa in February 1943. She remained on station performing convoy escort duties until January when she returned to the UK for a refit. During