Mezue ahịrịokwu na-esonụ: Ụzọ nke oge a nke A470 sitere na mkpọsa na 1970s site na "Western Mail" maka otu ụzọ na-ejikọta North na South Wales, na-eduga na
1979 Ntughari ntuli aka nke Welsh. Ọ bụ ihe ịga nke ọma, na na 1978, na Welsh Office tụlere a nwere N'ezie nke ụzọ dị ihe dị ka site na etiti nke mba, nke e emejuputa atumatu na-esote afọ.