<prompt> Bhala ukuqhubeka kwalesi sigaba - Umzila wanamuhla we-A470 uvela emkhankasweni wama-1970 we Western Mail womzila owodwa oxhumanisa iNyakatho neNingizimu Wales, ekuholeni kuze kube yi-1979 Welsh devolution referendum  <response>: . futhi. Kwaba yimpumelelo, futhi ngo-1978, i-Welsh Office yaxoxa ngomzila ongaba khona womgwaqo cishe maphakathi nezwe, owasetshenziswa ngonyaka olandelayo. 