Llywelyn's exiled daughter Gwenllian ferch Llywelyn and niece Gwladys ferch Dafydd states that Llywelyn at the front of his army approached the combined forces of Edmund and Roger Mortimer, Hugo Le Strange and Grufudd ap Gwenwynwyn on the promise that he would receive their homage. This was a deception. His army was immediately engaged in fierce battle during which a significant section of it was routed causing Llywelyn and his bodyguards to become separated. At around dusk
Llywelyn and a small group of his retainers (which included clergy) were ambushed and chased into a wood. Llywelyn was surrounded and struck down. As he lay dying he asked for a priest and gave away his identity. He was then murdered and his head hewn from his body.