Clogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UKClogwyn Y Fuwch slate mine, north Wales, UK