<prompt> Bhala ukuqhubeka kwalesi sigaba - Wajoyina iPlaid Cymru ngo-1973, ngemuva kokuthintwa umkhankaso ka-Emrys Roberts okhethweni lweMerthyr Tydfil. Ngonyaka olandelayo ngo-1974, waqala ukusebenza ePlaid Cymru njengesikhulu sokucwaninga sephalamende. Wahlala kulesi sikhundla kwaze kwaba nguDisemba ka-1979; kwaba unyaka onzima weqembu, elalibhekene nokwehlulwa ku-referendum yaseWales  <response>: futhi nokulahlekelwa yisihlalo sikaGwynfor Evans okhethweni jikelele. Njengoba kwakunabantu abambalwa eWestminster, leli qembu lalingasidingi isisebenzi esikhulu sephalamende futhi uGriffiths waxoshwa. 