Gwilym ap Tudur Rhys and Owain Glyndŵr. As a result, the Tudur brothers began planning an attack on Conway Castle. On Good Friday, 1 April 1401, the brothers and 44 men (which included those who had also been excluded from the pardons) infiltrated the castle. They had pretended to be carpenters, and captured the castle while the guard were in church. Negotiations began for the return of the castle on 13 April, with the king represented by Henry "Hotspur" Percy and Gwilym representing the Welsh forces. After seeking a compromise, which would have resulted in pardons being given to the Welshmen, the king
Owain Lawgoch his inheritance. Owain, his only son, was born in Surrey, where his grandfather had acquired the manor of Tatsfield. Tatsfield, a small village only 17 miles from the centre of London, still has Welsh place names e.g. Maesmawr Road (trans: Great Field Road). Thomas died in 1363 and Owain returned from abroad to claim his patrimony in 1365. Owain Lawgoch was in French service by 1369 and his lands in Wales and England were confiscated. The year in which Owain entered the service of the king of France is uncertain. Froissart claims that he fought on the French side at