At 8 & 17 mins, then off to Llanberis for slate: https://www.bbc.co.uk/iplayer/episode/b0078wmp/fred-dibnahs-made-in-britain-10-chains-and-copper

This video might also be of interest.

Fred Dibnah's Industrial Age S01 E04 Mining
https://www.youtube.com/watch?v=mXuzIhZbwcg

National Coal mining Museum 2:17
Lady Victoria Colliery 6:32
Killhope Mining museum 10:06
Wet Earth Colliery 13:38
Geevor/Levant tin mine 17:00
Big Pit Museum 19:46
Llechwedd Slate mine 24:08

I was fortunate enough to visit a few years back. Spectacular but scary!