HMS Grafton (H89) was a G-class destroyer built for the Royal Navy during the mid-1930s. During the Spanish Civil War of 1936–1939 the ship spent considerable time in Spanish waters, enforcing the non-intervention measures agreed by Britain and France. After the beginning of World War II she was transferred from the Mediterranean Fleet to Great Britain for escort and contraband inspection duties. Grafton was refitting when the Norwegian Campaign began in April 1940, but the ship escorted convoys to Norway once her refit was completed. She evacuated British troops from the Dunkirk bridgehead in May, but was sunk by a German submarine after she stopped to rescue survivors from another British destroyer.

HMS Glowworm was a G-class destroyer built for the Royal Navy in the mid-1930s. During the Spanish Civil War the ship spent part of 1936 and 1937 in Spanish waters, enforcing the arms blockade imposed by Britain and France on both sides of the conflict. Glowworm was transferred from the Mediterranean Fleet shortly after the beginning of World War II to the British Isles, to escort shipping in local waters. In March 1940, she was transferred to the Home Fleet, just in time to participate in the opening stages of the Norwegian Campaign. On 8 April 1940 Glowworm encountered German destroyers transporting troops to invade Norway in Operation Weserübung. The German destroyers attempted to disengage while calling for help from the heavy cruiser Admiral Hipper. In the chaos of battle, the heavily damaged Glowworm rammed Admiral Hipper. The collision broke off the destroyer's bow, and she sank shortly afterwards. The commander of Glowworm was awarded the VC at the recommendation of the commander of Hipper. There were only two other occasions when a VC was awarded at the recommendation of the enemy in the Second World War.