 She sank the German submarine in September 1942 and in December that year took part in the Battle of the Barents Sea in 1942, while escorting Convoy JW 51B to Russia.The convoy escorts held off attacks from the powerful , with "Onslow" being heavily damaged and her captain, Robert Sherbrooke, severely injured.She also saw detached service in the Mediterranean, covering the Malta Convoy Operation Harpoon in June 1942, and protected invasion shipping in the English Channel from German attack before and after the Normandy landings in mid-1944.