Vanguard-Class: Britain’s Nuclear Deterrent Rides on Four Submarines Aged 27 to 33. They Were Planned Around a 25-Year Service Life.

Vanguard-Class: Britain’s Nuclear Deterrent Rides on Four Submarines Aged 27 to 33. They Were Planned Around a 25-Year Service Life.

Vanguard-Class SSBNs in August 2026: Four Boats, Trident II and the Dreadnought Transition – Britain’s four Vanguard-class ballistic-missile submarines remain the country’s only operational strategic nuclear delivery system in August 2026. One boat is kept at sea at all times under Operation Relentless, continuing a Royal Navy mission that has run without interruption since 1969. The Ministry of Defence does not identify the submarine conducting…