HMS Spartan was a nuclear-powered fleet submarine of the Royal Navy's Swiftsure class. Spartan was launched on 7 April 1978 by Lady Lygo, wife of Admiral Sir Raymond Lygo. The boat was built by Vickers Limited Shipbuilding Group (now a division of BAE Systems) at Barrow-in-Furness in Cumbria, England. She was decommissioned in January 2006.