HMS Upholder (N99)

HMS Upholder (N99) HMS Upholder (N99) was a Royal Navy U-class submarine of the Second World War notable for an exceptionally successful Mediterranean patrol record under the command of Lieutenant Commander Malcolm David Wanklyn. Commissioned in 1940 and built by Vickers-Armstrongs at Barrow-in-Furness, the boat operated primarily from Malta and played a significant role in interdiction against Axis shipping during the Siege of Malta, the North African campaign, and the Battle of the Mediterranean. Upholder's aggressive posture, tactical innovations, and ultimate loss in 1942 made her one of the most storied submarines in Royal Navy wartime history.

Design and construction

Upholder was a member of the second group of U-class submarines, an evolution of earlier Royal Navy coastal submarines designed in the late 1930s for training and patrol duties. Ordered from Vickers-Armstrongs at Barrow-in-Furness she reflected design features influenced by lessons from World War I submarine development and contemporary continental designs such as those by Vickers (shipbuilders) and coastal designs employed by the Royal Navy Submarine Service. The hull form, diesel-electric propulsion, and armament—primarily four 21-inch bow torpedo tubes and a 3-inch deck gun—were engineered for operations in constrained waters like the Mediterranean Sea and approaches to Gibraltar. Displacement, endurance and sensor fit balanced with available industrial capacity at Vickers-Armstrongs yards during the wartime expansion led by figures in the Admiralty responsible for submarine procurement. Launching on 6 March 1940 and commissioning on 1 August 1940, Upholder joined the Royal Navy fleet as part of escalating submarine deployments to counter Axis maritime supply efforts to Italian Libya and the Axis powers' North African forces.

Operational history

Upholder deployed to the Mediterranean, operating from forward bases including Malta and Gibraltar, under the command of Lieutenant Commander Malcolm David Wanklyn. In patrols during 1941–1942 she attacked convoys supplying Axis forces in North Africa and interdicted shipping to Sicily and Tripoli. Her credited sinkings included merchantmen, escorts and supply vessels thought to be supporting the Afrika Korps led by Erwin Rommel. These operations intersected with major campaigns such as the Siege of Malta and the Battle of Gazala, and cooperated with Royal Navy formations including submarines, destroyers such as those of Force K (Malta), and RAF reconnaissance units like the Mediterranean Allied Coastal Air Force. Wanklyn's aggressive tactics earned him the Victoria Cross for actions aboard the boat, and Upholder received numerous battle citations. The submarine's patrols involved engagements with Italian units of the Regia Marina and German coastal convoys, reflecting the intensity of maritime warfare in the central Mediterranean theatre.

Loss and subsequent investigations

Upholder failed to return from a patrol in April 1942 and was declared overdue after her last reported action. Initial wartime attributions suggested loss to depth-charge attacks by Regia Marina escorts or by Luftwaffe anti-submarine aircraft, with proposed engagement locations in the approaches to Tripoli and off Sicily. Postwar examinations of Axis war diaries, signals intelligence from Bletchley Park, and captured documents prompted competing theories: one assessment attributed the sinking to depth charges from the Italian torpedo boat Pegaso and escorts after an attack near Benghazi, while another cited a German Sperrbrecher anti-submarine action recorded in April 1942. Later underwater archaeological surveys and reviews by the Royal Navy's historical branch attempted to reconcile positions, wreckage reports, and acoustic contact logs. Despite these studies, the precise cause and location remain subjects of debate among historians of the Battle of the Mediterranean and submarine warfare specialists.

Crew and commanding officers

The most prominent officer associated with Upholder was Lieutenant Commander Malcolm David Wanklyn, whose command saw the boat awarded for exemplary effectiveness; Wanklyn received the Victoria Cross and other decorations such as the Distinguished Service Order during his submarine career. The complement included petty officers, seamen and specialists drawn from Royal Navy ratings trained at establishments like HMS Dolphin (shore establishment) and officers who had served on other boats of the Submarine Service. The losses when Upholder vanished deprived families across the United Kingdom and communities connected to naval yards such as Barrow-in-Furness of servicemen commemorated on rolls of honour and memorials maintained by organizations including the Imperial War Museums and Royal Naval Association branches. Individual crew lists, medal citations and personal accounts are referenced in archival collections pertaining to Second World War Royal Navy submarine operations.

Preservation, memorials, and legacy

Although the wreck has not been conclusively identified to public satisfaction, Upholder's legacy is preserved through memorials and commemorations: names inscribed on the Malta Memorial and naval cenotaphs, exhibits at maritime museums such as the National Museum of the Royal Navy, and scholarly works chronicling submarine campaigns in the Mediterranean Sea. The story of Upholder features in studies of anti-shipping campaigns alongside research into the Siege of Malta, the North African campaign, and U-boat and Allied submarine doctrine. The commanding officer's Victoria Cross is held in collections associated with Imperial War Museums and public displays, while veteran associations and naval historians maintain records, oral histories, and memorial services that connect current submarine communities at establishments like HMS Raleigh with their wartime antecedents. Upholder remains a symbol of daring, sacrifice, and the complex historiography of naval loss during the Second World War.

Category:Royal Navy submarines Category:Submarines lost with all hands Category:World War II submarines of the United Kingdom