They defeated the Angles and besieged them on Lindisfarne but, according to the Historia Brittonum, Urien was assassinated at the behest of Morgant Bwlch who was jealous of his power.
Venceron aos anglos e cercáronos en Lindisfarne pero, segundo a Historia Brittonum, Urien foi asasinado por orde de Morgant Bwlch que estaba celoso do seu poder.