Mezue ahịrịokwu na-esonụ: Na nzaghachi maka mpụta nke Plaid Cymru na Scottish National Party (SNP) Gọọmentị Labour nke Harold Wilson guzobere Royal Commission on the Constitution (Kilbrandon Commission) iji nyochaa nhazi usoro iwu nke UK na 1969. Ntụziaka ya mechara bụrụ ihe ndabere nke Akwụkwọ ọcha nke 1974 "Democracy and Devolution: proposals for Scotland and Wales"., nke tụrụ aro ka e guzobe Nzukọ Welsh. Otú ọ dị, ndị ntuli aka jụrụ atụmatụ ndị ahụ site n'ọnụ ọgụgụ nke mmadụ anọ na otu n'otu.
referendum e mere n'afọ 1979.