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
Welsh English this, coupled with the closure of the monasteries, which closed down many centres of Welsh education, led to decline in the use of the Welsh language. The decline of Welsh and the ascendancy of English was intensified further during the Industrial Revolution, when many Welsh speakers moved to England to find work and the recently developed mining and smelting industries came to be manned by Anglophones. David Crystal, who grew up in Holyhead, claims that the continuing dominance of English in Wales is little different from its spread elsewhere in the world. While other British English accents have affected the