When Henry III died in November 1272, Edmund took a post in the governing council in England, and was among the councillors who wrote to Edward I to advise him of his father's death. Having inherited vast wealth from his own father, Edmund began making loans to prominent members of the court. In June 1273 he travelled to France to meet Edward I, and two months later, in Paris, acknowledged the repayment of 2,000 of the 3,000 marks that the king owed him. Edmund was present at Edward's coronation in Westminster Abbey, and in summer 1277 took fourteen of his knights to join Edward's expedition to Wales. In 1279 Edmund was appointed, along with Thomas de Cantilupe, Bishop of Hereford, and Godfrey de Giffard, Bishop of Worcester, to the regency council formed to govern England when Edward and Eleanor, the Queen consort, travelled to France to take possession of Ponthieu. Edmund also lent the king 3000 marks that year, to aid a re-coinage. In May 1280 he travelled abroad with the abbot of Colchester, and in June, with the assistance of Eleanor and Robert Burnell, Bishop of Bath, resolved a long-standing dispute with the bishop of Exeter over rival jurisdictions.