Force H was ordered to join the escort of Convoy WS 8B in the North Atlantic on 24 May, after the Battle of the Denmark Strait on 23 May, but they were directed to search for the and the heavy cruiser on 25 May. Heavy seas increased fuel consumption for all of the escorts and "Forester" was forced to return to Gibraltar to refuel later that day before rejoining the capital ships of Force H on 29 May, after "Bismarck" had been tracked down and sunk. In early June the destroyer participated in two more aircraft delivery missions to Malta (Operations Rocket and Tracer). While returning to Gibraltar to refuel, after covering another WS convoy west of Gibraltar, she participated in the sinking of , together with four of her sisters on 18 June. In late June, "Forester" screened "Ark Royal" and "Furious" as they flew off more fighters for Malta in Operation Railway.