Rubuta ci gaba don wannan sakin layi - Ƙaddamar da ƙwarewar Labour na tsarin siyasa na musamman na Welsh an yi jayayya a shekarar 1966 lokacin da shugaban Plaid Cymru Gwynfor Evans ya lashe zaben Carmarthen. Dangane da fitowar Plaid Cymru da Jam'iyyar Scottish National Party (SNP) Gwamnatin Labour ta Harold Wilson ta kafa Hukumar Masarauta kan Kundin Tsarin Mulki (Kwamitin Kilbrandon) don bincika tsarin tsarin mulkin Burtaniya a cikin 1969. Gwamnatin Labour ta 1974-1979 ta ba da shawarar Majalisar Welsh a layi daya da shawarwarinta ga Scotland. Wadannan sun ƙi masu jefa kuri'a a cikin 1979 referendum
: Kuri'u 956,330 sun yi adawa, 243,048 sun goyi bayan.