Three of Britain's four Vanguard-class nuclear submarines are now at sea at the same time, an unusual deployment not seen for more than five years, according to The Times. At least one submarine carries Trident ballistic missiles armed with nuclear warheads, while the other two are conducting sea trials or preparing for operations. The fourth submarine, remains at Devonport under maintenance. Naval sources described the deployment as unusual but suggested that it reflected improvements in the Royal Navy's operational readiness rather than a deliberate signal to Russia.

Three of Britain's four Vanguard-class nuclear submarines are now at sea at the same time, an unusual deployment not seen for more than five years, according to The Times. At least one submarine carries Trident ballistic missiles armed with nuclear warheads, while the other two are conducting sea trials or preparing for operations. The fourth submarine, remains at Devonport under maintenance. Naval sources described the deployment as unusual but suggested that it reflected improvements in the Royal Navy's operational readiness rather than a deliberate signal to Russia.