Walmer Castle against Charles' brother, King James II, the townsfolk of Deal seized Walmer Castle on behalf of William III, the Prince of Orange. By the end of the century, however, the castle was increasingly regarded as out of date from a military perspective. In the 18th century, Walmer Castle became the official residence of the Lord Warden of the Cinque Ports. The Lord Warden was originally a medieval title linked to five key ports along the coast of England; the position's prominence had faded, but it still retained important judicial and military functions. When Lionel Sackville, the Duke of Dorset, was
89th (Cinque Ports) Heavy Anti-Aircraft Regiment, Royal Artillery later captured at the Fall of Tobruk in June 1942). Lt-Col W.R. Brackett took over as CO of 89th HAA Rgt and AADC Suez. 231 HAA Bty, from 74th (City of Glasgow) HAA Rgt, officially replaced 234 (Kent) Bty in 89th HAA Rgt on 1 December. Regimental morale was boosted in February when Prime Minister Winston Churchill, as Lord Warden of the Cinque Ports, accepted the appointment of Honorary Colonel of the regiment. By the end of February 1942, 89th HAA RHQ/AADC Suez had six 4-gun HAA sites manned by 205, 231 and 282 HAA Btys, 20 Bofors gun sites