HMS Westminster was a W-class destroyer constructed for the Royal Navy, launched on 24 February 1918 by Scotts Shipbuilding and Engineering Company in Greenock, Scotland. Ordered in December 1916 as part of the 1916–17 Programme, she was laid down in April 1917 and commissioned in April 1918. As a W-class vessel, Westminster was built during the final months of World War I, initially serving in the North Sea escorting battle cruisers and later accompanying the German High Sea Fleet to Rosyth after Germany's surrender in November 1918. Throughout her early service, Westminster was involved in the post-war evacuation of the cruiser Cassandra after it struck a mine, and she experienced a collision with the destroyer Verulam in foggy conditions shortly thereafter, requiring extensive repairs. She also served in the Baltic amid conflicts with Russian warships and was part of the Atlantic Fleet's 6th Flotilla in 1921 before being placed in reserve. By 1939, Westminster underwent a significant refit at Devonport Dockyard to convert her into an anti-aircraft escort as part of the Royal Navy’s rearmament efforts. Her pennant number was changed from L50 to D45, reflecting her new role. During World War II, she participated in convoy defense in the North Sea and the English Channel, supporting military operations and covering evacuations during the Dunkirk evacuation in May 1940. Notably, she was damaged by a submerged wreck off Dunkirk and was one of the last ships repaired there before the town fell to German forces. Throughout the war, Westminster primarily protected vital convoys along the British coast, engaging German E-boats in combat and sinking three of them in October 1940. She was equipped with anti-aircraft guns and specialized radio equipment for coordination with aircraft and escorts, emphasizing her role in convoy protection rather than offensive operations like Normandy landings. After the war, Westminster briefly served as a courier to Norway before being withdrawn from active service and placed in reserve. She was sold for scrap in 1947, towed to Charlestown, and dismantled in 1948. Her service record highlights her longevity and adaptability across both World Wars, marking her as a significant example of early 20th-century Royal Navy destroyer design and wartime evolution.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.