Royal Navy Submarines
Nuclear-powered Ballistic Missile Submarines (SSBN)
Vanguard Class LOA 492′ TDISP 15,900 tons submerged (4 active, service since 1993)
Resolution Class LOA 425′ TDISP 8,400 tons submerged (4 retired, service 1968-1996) units all stored at Rosyth, pending disposal solution.
Fleet submarines (Nuclear powered) SSN
Astute Class LOA 318′ TDISP 7,400 tons submerged (7 planned, 4 in service, service since 2010)
HMS Audacious S-122 (2020)
Trafalgar Class LOA 280′ TDISP 5,250 tons submerged (7 built, 2 active, service since 1983)
Swiftsure class LOA 272′ TDISP 4,900 tons submerged (6, all retired, service 1973-2010)
HMS Sovereign S-108 (1974-2006) laid up at Devonport. First Swiftsure class submarine laid up there.
HMS Swiftsure S-126 (1973-1992) note lack of propulsor at stern, which rest of class had. Laid up at Rosyth.
Valiant AND Churchill classes LOA 285′ TDISP 4,900 tons submerged. (5 retired, 1 preserved, rest laid up awaiting scrapping) classes very similar. Churchills were repeats of the Valiants with internal improvements
HMS Courageous S-50 (1971-1992) Museum Boat at Devonport. Falklands War veteran.
HMS Conqueror S-48 (1971-1992) Laid up at Devonport. Falklands War veteran. Sank the Argentine cruiser ARA General Belgrano.
HMS Churchill S-46 (1968-1991) Laid up at Rosyth awaiting disposal.
HMS Dreadnought S101 (1963-1980) LOA 266′ TDISP 4,000 tons submerged. First British nuclear submarine. Laid up at Rosyth awaiting disposal.
Attack Submarines (Diesel Electric) SS
For Upholder Class, see Canadian Victoria Class
Oberon Class LOA 295′ TDISP 2,400 tons submerged (27 built, service with 5 navies, all retired) See also Australian submarines, Brazilian Submarines, Canadian Submarines, Chilean Submarines, for other Oberons.
HMS Ocelot S-17 (1964-1991) Museum boat Chatham Historic Dockyard since 1992.
HMS Otus S-18 (1963-ca. 1992) Museum boat in Sassnitz, Germany.
HMS Onyx S-21 (1967-1991) Museum Boat at Birkenhead on display with Warship Preservation Trust, until it went bankrupt. Displayed at Barrow-in-Furness until 2014, scrapped. Falklands War veteran.
HMS Alliance P-417 (1947-1979) Amphion Class LOA 281′ TDISP 1,600 tons submerged. Museum ship at Royal Navy Submarine Museum, Gosport.