He was succeeded by his eldest surviving son, the second Earl. He was Lord-Lieutenant of Buckinghamshire, Lancashire, Cheshire and Herefordshire. On his death the titles passed to his eldest son, the third Earl. He was a Whig politician and served as First Lord of Trade and as First Lord of the Admiralty. His eldest son from his first marriage, John Egerton, died as an infant, while his two elder sons from his second marriage, Charles Egerton, Viscount Brackley, and the Hon. Thomas Egerton, both died in the fire which destroyed Bridgewater House in London. Lord Bridgewater was succeeded by his eldest surviving son from his second marriage, the fourth Earl. He served as Lord-Lieutenant of Buckinghamshire and also held several positions at court. In 1720 he was created Marquess of Brackley, in the County of Northampton, and Duke of Bridgewater, in the County of Somerset. Both titles were in the Peerage of Great Britain.