The Royal Navy's nuclear-powered submarine HMS Vanguard has returned to HM Naval Base Clyde after completing the longest patrol in the history of Britain’s strategic submarine fleet. The patrol lasted 204 days, surpassing the previous 195-day record set by HMS Vigilant in 2023.

HMS Vanguard completes longest strategic deterrent patrol in Royal Navy history

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The Royal Navy’s nuclear-powered submarine HMS Vanguard has returned to HM Naval Base Clyde after completing the longest patrol in the history of Britain’s strategic submarine fleet.

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