To the west on the borders of Shropshire is Blore Heath, the scene of a defeat of the Lancastrians by the Yorkists in 1459.
The Yorkists had many adherents in Ireland, and thither Lambert Simnel was taken by Symonds early in 1487; and, gaining the support of the earl of Kildare, the archbishop of Dublin, the lord chancellor and a powerful following, who were, or pretended to be, convinced that the boy was the earl of Warwick escaped from the Tower, Simnel was crowned as King Edward VI.
In the 14th century the castle was held by the Mortimers, from whom it passed to the Yorkists.
When France went over to the Yorkists, Kennedy, accepting an English pension, made a long truce between Scotland and England (October 1464).
Her fierce partisanship embittered her enemies, and the Yorkists did not hesitate to allege that her son was a bastard.