<prompt> Qedela umusho olandelayo: Wajoyina iPlaid Cymru ngo-1973, ngemuva kokuthintwa umkhankaso ka-Emrys Roberts okhethweni oluncane lwaseMerthyr Tydfil. Ngonyaka olandelayo ngo-1974, waqala ukusebenza ePlaid Cymru njengesikhulu sokucwaninga sephalamende. Wahlala kulesi sikhundla kwaze kwaba ngoDisemba 1979; kwakuwunyaka onzima weqembu, elalibhekene nokunqotshwa eMkhandlwini kaMongameli ngo-  <response>: Ukudluliswa kwegunya eWales nokulahleka kwesihlalo sikaGwynfor Evans okhethweni jikelele. Njengoba kwakunabantu abambalwa eWestminster, leli qembu lalingasidingi isisebenzi esikhulu sephalamende futhi uGriffiths waxoshwa. 