Now all the deep coal mines in the UK are closed the only way to go underground today is in a museum like The Big Pit National Museum at Blaenavon.

The Big Pit used to be connected to the LNWR line to Pontypool by a steeply graded mineral line. Today Hudswell Clarke 0-6-0ST (Works No 544 1900) NCB No 10 stands on the truncated remains by the pit head coupled to a rail-mounted crane.