Shaft to south of mineral railway track with naturl cave. Cris Ebbs describes as:

The entrance is a mine shaft 37m deep to an excavated hole at the foot of the shaft through domestic rubbish. A level a few metres long leads to the head of a second pitch of 12m into the natural cavern. This is about 3m high x 12m wide x 27m long. A crawl from the north-west corner of this chamber was excavated by GCC who entered two small chambers with a dig in the floor at the end. The first of these chambers, Flush Pot, has a small stream entering from the roof, but this comes from a sewerage treatment plant on surface!