[1] In May 1943, the Royal Navy selected Blencathra for participation in Operation Husky, the Allied invasion of Sicily planned for July 1943, and she began preparations for foreign service.

[1] While at Gibraltar in early July 1943, Blencathra was transferred to the 58th Destroyer Division of the Mediterranean Fleet, assigned to escort military convoys to Sicily for the amphibious landings there.

[1] In August 1943, Blencathra and the rest of the 58th Destroyer Division was based at Malta and assigned to patrol and escort duty in the central Mediterranean Sea.

[1] After the Dodecanese Campaign ended in an Allied defeat, Blencathra and the rest of the 58th Destroyer Division were based at Alexandria in December 1943 for patrol and escort duties in the Eastern Mediterranean.

[1] In January 1944, the 58th Destroyer Division was transferred to Malta, where it conducted patrols and escorted convoys in the central Mediterranean, including the protection of shipping supporting Operation Shingle, the Allied invasion at Anzio and Nettuno, Italy.

[1][2] In April 1944, the Royal Navy selected Blencathra, Hambledon, and Mendip to participate in Operation Neptune, the initial assault phase of the Allied invasion of Normandy scheduled for early June 1944.

In early June 1944, she joined the 113th Escort Group – consisting of the frigates Waldegrave and Whitaker and the sloops Hart and Whimbrel – and steamed with it to Milford Haven, Wales, from which the group was to escort Convoy EBP 2 – five troop transports carrying United States Army troops for discharge on Utah Beach, the headquarters ship for Mulberry B, and three smaller merchant ships – to Normandy.

Blencathra then steamed to Plymouth and, based there with Hambledon and Mendip, defended convoys carrying reinforcements and supplies to the Normandy beachheads until released from such duties on 30 June 1944.

After that, she operated in support of re-occupation forces and visited ports in the United Kingdom and on the European continent until 15 August 1945, when she suffered damage in a collision with the merchant ship Willowdale.

She was among ten Hunt-class escort destroyers placed on the disposal list in October 1956 and was sold to the British Iron & Steel Corporation (BISCO) for scrapping before the end of the year.