While Deheubarth was being disputed between Hywel and Gruffydd ap Llywelyn, Gruffydd ab Rhydderch made off with the prize in 1044. He succeeded in beating off a formidable challenge from Gruffydd ap Llywelyn in alliance with earl Godwin's son, Swegen, and in 1049 took the offensive, with Viking support, harassing Gwent and the Severn estuary. The Anglo-Saxon Chronicle reported that the English relief force, led by bishop Ealdred of Worcester, was surprised and cut up. However, in 1055 Gruffydd was overthrown and killed by Gruffydd ap Llywelyn, who took possession of Deheubarth.
Subjects: British History.