The Commission has determined that a county constituency be created from:The Bridgend UK Parliamentary constituency,and:The Vale of Glamorgan UK Parliamentary constituency.
Mae’r Comisiwn wedi penderfynu creu etholaeth sirol o’r canlynol:Etholaeth Seneddol y Deyrnas Unedig Pen-y-bont ar Ogwr,ac:Etholaeth Seneddol y Deyrnas Unedig Bro Morgannwg.