The owners of a Gwynedd quarry that is the highest industrial site in the UK want to extend its working life.
Cwt y Bugail at Manod Mawr, Blaenau Ffestiniog, dates back to the 1840s and was originally a mined quarry before becoming an open cast site.
It was also where many of Britain’s most valuable paintings were secretly stored in its caverns for safe-keeping during World War Two.
