The Vanguard-class submarines were developed in the 1960s as part of the UK's Trident nuclear program, which aimed to replace the aging Resolution-class submarines and their Polaris missiles.

Russia may have planted trackers around core areas of submarine travel on the seabed around the British Isles, which would allow the Kremlin to observe NATO movements at sea.

The country's current needs in this respect are handled by a class of subs known as the Vanguard ... will carry 12 Trident II D5 submarine-launched ballistic missiles armed with up to 144 nuclear ...

Its submarine force is probably the most secretive ... poised to launch the UK’s nuclear deterrent Trident missiles. This would be in response to an attack from Russia or any of the west ...

Amid evolving defense concerns, France and the UK's nuclear arsenals are vital to Europe's security strategy in light of ...

After 204 days, a Royal Navy nuclear-powered submarine broke the record for ... each carrying Trident II D5 missiles. Introduced in 1994, the subs are the largest built in the UK and the third ...