Pope Gregory X
Henry was Archdeacon of Oxford from 1259 to 1262. He was elected Bishop of London on 13 November 1262, confirmed 21 December and consecrated on 27 May 1263. He was suspended from office on 1 December 1265 but was reinstated by Pope Gregory X on 31 May 1272. He returned to England from exile on 31 January 1273.