[3] In the late 1390s, Edward was sent on embassies to France and to the Count Palatine and was appointed to numerous offices, including Constable of Dover Castle, Lord Warden of the Cinque Ports, Keeper of the Channel Islands, Constable of the Tower, Warden of the New Forest, Keeper of Carisbrooke Castle and Lord of the Isle of Wight.

On 11 August 1398 he was granted custody of the lands of Roger Mortimer, Earl of March, during Mortimer's son's minority, and on 20 March 1399 lands which had lately belonged to John of Gaunt, Duke of Lancaster, and which were part of the inheritance of his son, Henry Bolingbroke, the future King Henry IV.

News of the strength of Bolingbroke's army then caused the King to desert the troops with him and travel to North Wales in an attempt to join Salisbury.

[7] In response to public animosity towards King Richard's closest associates, Henry IV deprived Edward of his office of Constable of the Tower on 31 August 1399, shortly after his accession.

The King confirmed him in his offices in connection with the Channel Islands and the Isle of Wight, and by 4 December 1399 had made him a member of his council.

Edward is alleged by a French chronicler to have betrayed to the King a conspiracy at the end of 1399 by a group of Richard II's former favourites who planned to murder Henry IV and his sons at a jousting tournament at Windsor Castle on 6 January 1400.

But according to James Tait, contemporary English sources that describe the conspiracy make no mention of Edward, and his role in it is open to question.

Both this and his appointment in Aquitaine proved very costly, and by June 1404, he had sold or pledged his plate and was contemplating mortgaging his lands to pay his troops in Wales.

On 13 February 1405, the young Edmund Mortimer and his brother Roger were abducted from Windsor Castle, but quickly recaptured near Cheltenham.

His lands were restored to him on 8 December 1405, and in November 1406, he was again made Constable of the Tower and continued to serve in a military capacity in Wales.

Edward was buried in the Church of St Mary and All Saints, Fotheringhay, where he had earlier established a college for a master and twelve chaplains.

As head of the House of York Richard would go on to challenge the Lancastrian claims to the English crown and thus start the Wars of the Roses.

[21] Between 1406 and 1413 he translated and dedicated to the Prince of Wales the Livre de Chasse of Gaston III, Count of Foix, one of the most famous of the hunting treatises of the Middle Ages, to which he added five chapters of his own, the English version being known as The Master of Game.

As a grandson of the sovereign in the male line Edward of Norwich bore the arms of the kingdom, differenced by a label 3-point, per pale Castile and Leon.

[22] In 1402 he inherited his father's arms, which were those of the kingdom differentiated by a label argent of three points, each bearing three torteaux gules.