Dewch i brocio'r cof yng nghwmni John Hardy wrth i ni ddilyn ffordd yr A40 o Lundain i Abergwaun. John Hardy goes along the A40 from London to Fishguard.
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Dewch i brocio'r cof yng nghwmni John Hardy wrth i ni ddilyn ffordd yr A40 o Lundain i Abergwaun. John Hardy goes along the A40 from London to Fishguard.
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
