Delabole Slate

The five quarries operating in Delabole merged to form the Old Delabole Slate Company [in 1841]. 1999: A management buyout, led by George Hamilton, returned the quarry to local ownership. 2005: The Hamilton family assumed full ownership, marking the first time since the 1830s that the quarry was under single-family control. [At its peak] Delabole employed over 1,000 workers and extracted an average of 120 tonnes of slate daily.

Quoted from delaboleslate.co.uk, in Delabole Slate's own words. We have not edited it and we do not vouch for it.