William le Scrope

Biography: http://www.isle-of-man.com/manxnotebook/mannin/v5p257.htm

Brief excerpt from above link

"He was created Earl of Wiltes in 1397. In 1398 he was appointed Ambassador to treat for peace with Robert, King of Scotland, and in 1399 was made Lord Treasurer of England. The following year King Richard II. appointed him one of the three Guardians of the Realm during his (the King's) absence in Ireland. The Queen Isabel (then only eleven years of age) was placed under his care at Wallingford Castle. From thence he retired to Bristol Castle, where he was defeated by Henry of Bolingbroke, and beheaded without trial, in July, 1399. His head was sent in a white basket to London and placed on London Bridge. After the accession of Henry IV, it was delivered to his widow.

He married Isabelle, daughter of Sir Maurice Russell, but had no issue. Shakespeare in Rich. II, 111,2, records the announcement of his death to the King."