Lord Warden of the Cinque Ports was combined from 1267 with the office of Constable of Dover Castle. However, from 1708 Walmer Castle at Deal was to be preferred as the official residence of the Lord Warden of the Cinque Ports. The Lord Warden also holds the office of Admiral of the Cinque Ports with a maritime jurisdiction extending to the middle of the English Channel, from Redcliffe near Seaford, in Sussex to the shore underneath the Naze Tower, encompassing Brightlingsea in Essex, the only Cinque Port north of the Thames. In earlier centuries the northern limit was taken as the Shoe Beacon in Essex. The
Lionel Sackville, 1st Duke of Dorset he was chosen to inform George I of his accession to the Crown in August 1714. George I initially favoured him and numerous offices and honours were given to him: Privy Councillor, Knight of the Garter, Groom of the Stole, Lord Steward , Governor of Dover Castle and Warden of the Cinque Ports. At George I's coronation he carried the sceptre: at the coronation of George II he was Lord High Steward and carried St Edward's Crown. He quarreled with the King in 1717 and was told his services were no longer required, but he was made a Duke three