In February 1944, Balfour was part of the 1st Support Group, supporting convoys to the west of Ireland. In June 1944, the Allies invaded Normandy, and the 1st Escort Group, including Balfour, was one of six Escort Groups deployed to form a barrier about 130 miles west of Lands End to prevent German U-boats based in the French Atlantic ports from interfering with the landings.
In February 1944, Balfour was part of the 1st Support Group aiding convoys off Ireland's western coast. In June 1944, Allied forces invaded Normandy, and the 1st Escort Group, which included Balfour, among six escort groups, established a barrier about 130 miles west of Lands End to deter German U-boats from interfering with the landings.