Key Points and Summary - The Royal Navy's nuclear deterrent relies on its four Vanguard-class submarines (SSBNs), which have maintained a Continuous At-Sea Deterrence patrol since the 1990s. -Armed ...

A Royal Navy sailor aboard a nuclear attack submarine has been arrested on suspicion of causing a bomb hoax. As first reported in The Sun, a Petty Officer aboard HMS Vanguard called in a bomb warning ...

What You Need to Know: In 2009, a potentially catastrophic incident occurred when the United Kingdom’s HMS Vanguard and France’s Le Triomphant, both nuclear-armed ballistic missile submarines, ...