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
Cinque Ports Fortress Royal Engineers Fourth Army by the time of the Armistice, while 547 Company moved to VI Corps in September and to Third Army by November 1918. 546th and 547th Army Field Companies were disbanded in France on 4 June 1919 and 1 May 1919 respectively. When the TF was constituted as the Territorial Army in the 1920s, the Cinque Ports (Fortress) RE was reformed as three Lights Companies, forming part of the Coast Defence Troops in 44th (Home Counties) Divisional Area. During World War II the Cinque Ports Fortress RE once again provided a field unit: 579 Army Field Company, formed in