In 1993 we visited South Crofty tin mine in Cornwall and were able to descend the shaft to see some of the underground operations. This snippet shows part of the exciting 3 minute descent in the double-deck cage to the 380 fathom level 

IA Recordings have placed several snippets from  their immense collection of Dvd's on the web see the link below

https://vimeo.com/401705715

Mike