The English violation of the unpopular peace agreement—probably with Suffolk's approval—has enabled French armies to seize all English holdings in northern France except for Calais.

Suffolk cannot avoid taking the blame for these failures, partly because of the loss of Maine and Anjou through his marriage negotiations regarding Henry VI.

He is arrested on January 28, 1450, and imprisoned in the Tower of London.

Impeached in Parliament by the House of Commons, he is banished for five years, but on his journey to Calais his ship is intercepted, and on May 2 he is executed.

It is suspected that his archenemy the Duke of York was responsible for his beheading on the gunwales of one of his boats and his body was thrown overboard.

He is later found on the seashore near Dover and the body is brought to a Church in Suffolk, possibly Wingfield, for burial, seemingly at the wishes of his wife Alice.