Llywelyn ap Dafydd is captured on June 28, and Welsh resistance to the invasion temporarily comes to an end.

Edward on June 28, issued writs to summon a parliament to meet at Shrewsbury, to discuss Dafydd's fate.

Dafydd ap Gruffudd, Prince of Wales, is on September 30 condemned to death, the first person known to have been tried and executed for what from this time onward will be described as high treason against the King.

Edward ensured that Dafydd's death was to be slow and agonizing, and also historic; Daffyds has the dubious distinction of being the first prominent person to be executed by drawing and quartering, preceded by a number of minor knights earlier in the thirteenth century.

The condemned man is attached to a horse's tail and dragged to the gallows, hanged by the neck briefly, revived and, while still alive, disemboweled (drawn).

His entrails are then burned before him and his body divided into four parts.

Dafydd's daughter Gwladys, like her cousin Gwenllian ferch Llywelyn, is sent to a convent in Lincolnshire—Gwenllian to Sempringham and Gwladys to Sixhills, where she will die in 1336.

Dafydd's sons are both imprisoned at Bristol Castle; Llywelyn ap Dafydd will die at Bristol Castle in mysterious circumstances in 1287 or 1288, while Owain ap Dafydd is last found living in August 1325.

Dafydd may have had another (illegitimate) son, Dafydd Goch, who survived.

One cadet member of the ruling House of Cunedda also survives, Madog ap Llywelyn, who in 1294-95 will lead a nationwide revolt.