After temporary repairs at Murmansk, "Onslow" returned to Britain as part of Convoy RA 52 at the end of January 1943, then was repaired at a commercial shipyard in Kingston upon Hull, rejoining the fleet at the end of April that year. In early November 1943, "Onslow" formed part of the distant escort for Convoy RA 54A on its return from Russia, and then took part in the close escort of Convoy JW 54A from 18 to 24 November and in the close escort of the return Convoy RA 54B from 28 November to 5 December, with none of the convoys being attacked by German forces. From 22 to 29 December, "Onslow" formed part of the escort for Convoy JW 55B. An attempt by the to attack the convoy resulted in the Battle of the North Cape on 26 December, when "Scharnhorst" was sunk by the battleship . The convoy itself was not affected. "Onslow" returned to Britain as part of the escort of Convoy RA 55B from 1 January to 7 January 1944.