He directed the blockade of Brest for six months. Driven off station by a storm the French fleet under Hubert de Brienne, Comte de Conflans, took advantage and left port. On November 20, 1759 he traced the French warships to Quiberon Bay and during a gale he won a sufficient victory, combined with Edward Boscawen's success at Lagos Bay, to remove the French invasion threat.
He then retired from active duty, given the honourary rank of Vice-Admiral of Great Britain in November1765, he was made First Lord of the Admiralty in December1766 and served until January1771. He was made a baron in 1776.