Anson oversaw the Navy for much of the Seven Years' War, and established a permanent squadron at Devonport which could patrol the western approaches to both Britain and France. He was particularly concerned at the prospect of a French invasion of the British Isles which led him to keep a large force in the English Channel. In 1756 he was criticised for not sending enough ships with Admiral Byng to relieve Minorca because he wanted to protect Britain from a threatened invasion, only to see Byng fail to save Minorca while no invasion attempt materialised. He left the Admiralty when the Newcastle ministry fell in November 1756 and then served again as First Lord when the Pitt–Newcastle ministry was created in June 1757.