Commissioned at Port Arthur on November 4, 1942, Mulgrave arrived at Halifax on November 30 and was assigned to Halifax Force for the first quarter of 1943. She then transferred to WLEF becoming a member of newly created EG W-2 in June, 1943. On February 18, 1944, with Bayfield, Georgian and Thunder, she left Halifax for Plymouth via the Azores. On February 29, when entering Horta, Mulgrave suffered grounding damage and had to be towed to Greenock, Scotland. After repairs at Ardrossan she finally made Plymouth on April 24 to commence training and exercises. She was temporarily assigned to the 32nd Minesweeping Flotilla, then in June to the 31st, with which she was present on D-Day. On October 8, 1944, the unlucky Mulgrave was damaged by a ground mine near Le Havre and had to be beached. On November 3 she left Le Havre in tow for Portsmouth, where she was declared a constructive total loss. Placed in reserve at Falmouth in January, 1945, with a reduced complement, she was formally paid off on June 7 and scrapped at Llanelly, Wales, two years later.