Dursley commanded HMS St George in 1706,[1] and narrowly escaped the Scilly naval disaster in which Sir Cloudesley Shovell in HMS Association was lost on 23 October 1707.[1] The St George ran aground on the same ledge as the Association, but was lifted off with the next wave. It is said that it was Dursley who gave his close friend Shovell the priceless emerald ring which features prominently in some of the legends still told about the disaster.[2] With the death of Sir Clowdisley Shovell, a promotion of flag-officers was made. Rear Admiral Robert Fairfax, was to be commissioned as a Vice Admiralof the Blue (it was signed by the Lord High Admiral and gazetted) but was then cancelled, and Dursley, who was his junior and because of the political influence of his family, made Vice Admiral of the Blue in his stead with seniority of 10 January 1708. Dursley was then promoted to Vice Admiral of the White in late 1708. In April 1709 he recaptured HMS Bristol, which had been taken by the French a short time earlier, but she sank shortly afterwards. Dursley was promoted to Vice Admiral of the Red in December 1709.[1][3]
With the death of his father on 24 September 1710, Dursley succeeded to his titles and became the 3rd Earl of Berkeley.[1] That year, he was also made High Steward of Gloucester, Warden of the Forest of Dean, Constable of St. Briavel's Castle, and Lord Lieutenant of Gloucestershire, which he held until 1712, and then from 1714 to his death, and Custos Rotulorum of Surrey, which he held until his death. In 1714, besides his restoration to his offices in Gloucestershire, he was made a Lord of the Bedchamber.
Lord Hervey wrote "he was a man of great family and great quality, rough, proud, hard, and obstinate, with excellent good natural parts, but so uncultivated that he was totally ignorant of every branch of knowledge but his profession. He was haughty and tyrannical, but honourable, gallant, observant of his word; equally incapable of flattering a prince, bending to a minister, or lying to anybody he had to deal with."