Appointed a clerk in the royal chancery, Langton became a favourite servant of Edward I, and was appointed Keeper of the wardrobe from 1290 to 1295. He took part in the suit over the succession to the Scottish throne in 1292, and visited France more than once on diplomatic business. In 1293 he rushed to Lambeth to obtain a charter transferring the Isle of Wight to the king from Isabella de Fortibus who was near to death.Barbara English, Forz , Isabella de, suo jure countess of Devon, and countess of Aumale (1237–1293), Oxford Dictionary of National Biography, Oxford University Press, September 2004; online edition (subscription required), January 2008. Accessed: 5 January 2011 He became Treasurer from 1295 to 1307Fryde Handbook of British Chronology p. 104 and obtained several ecclesiastical preferments,. On 20 February 1296 he was elected bishop of Lichfield, being consecrated on 23 December.Fryde Handbook of British Chronology p. 253 As bishop he rebuilt the diocesan seat, Eccleshall Castle, in a more lavish style.
