Each submarine is designed to carry 16 Trident missiles, capable of delivering multiple warheads - but in recent years, they have carried eight missiles each, with a maximum of 40 warheads per boat.

Reports a test firing of a Trident missile from a Royal Navy submarine has failed for the second time in a row has refocused attention on the UK's nuclear capability. The current Vanguard nuclear ...

In 2007, Tony Blair's Labour government decided to renew the Trident submarine fleet. And in 2016, the UK Parliament again voted to maintain Britain's nuclear capability.