This is a list of Royal Navy submarines, arranged chronologically. Submarines that are currently active and commissioned are shown below in bold.
Pre-First World War
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Late 1950s to late 1980s
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From HMS Porpoise Royal Navy submarines were given their own "S" pennant numbers.
- Porpoise class (Diesel-electric hunter-killer)
- Oberon class (Diesel-electric hunter-killer)
- Oberon, commissioned/decommissioned: 1961–1986
- Onslaught, c/d: 1962–1990
- Orpheus, c/d: 1960–1990 (harbour service from 1987)
- Odin, c/d: 1962–1990
- Otter, c/d: 1962–1991
- Olympus, c/d: 1961–1989
- Oracle, c/d: 1963–1993
- Ocelot, c/d: 1964–1991
- Otus, c/d: 1963–1991
- Opossum, c/d: 1964–1993
- Opportune, c/d: 1964–1993
- Osiris, c/d: 1964–1989
- Onyx, c/d: 1967–1991
- Dreadnought (Nuclear-powered hunter-killer), commissioned/decommissioned: 1963–1980
- Valiant class (PWR1 nuclear-powered hunter-killer)
- Resolution class (PWR1 nuclear-powered ballistic missile)
- Churchill class (PWR1 nuclear-powered hunter-killer)
- Swiftsure class (PWR1 nuclear-powered hunter-killer)
- Trafalgar class (PWR1 nuclear-powered hunter-killer)
- Vanguard class (PWR2 nuclear-powered ballistic missile)
- Astute class (PWR2 nuclear-powered hunter-killer)
- Astute, commissioned: 2010
- Ambush, commissioned: 2013
- Artful, commissioned: 2016
- Audacious, commissioned: 2020
- Anson, commissioned: 2022
- Agamemnon, construction began: 2013/Expected commission: 2025
- Agincourt, confirmed, steel cut/Expected commission: 2026
- Dreadnought class (PWR3 nuclear-powered ballistic missile)[1]
- Dreadnought, under construction - first elements of construction underway in 2016[2]
- Valiant, under construction
- Warspite, under construction
- King George VI, ordered