The BFI in London have a season on the coal industry, King Coal. This includes two related Ken films, the 16 minute
The Miners' Picnic from 1960 and Ken's return 45 years later with the 30 minute
The Miners' Picnic with Ken Russell.
Both are excellent and highly recommended.
Details are here:
www.bfi.org.uk/about/news/2009-07-02-coal.html