Third party approval
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Third party approval
by Welsh Slate
The extraction of slate and manufacture of slate products
Welsh Slate Penrhyn Heather Blue Natural Roofing Slate
ISO 45001: 2018 Cwt-y-Bugail Quarry
ISO 45001:2018 Penrhyn Quarry
ISO 45001:2018 Blaenau Ffestiniog
ISO 9001: 2015 Blaenau Ffestiniog