build Derbyshire Key required.
The entrance is located in a small tree-lined enclosure opposite the entrance to Eyam Hall car park on the opposite side of the New Close Road and to the west of Delph Close. The lid requires a large Derbyshire key (requires a 90 degree turn/marked on lid in marker pen) and must be closed when underground which can be done from inside. The entrance pitch is a 12m hading rift with scaffolding at the top.
See Eldon Pothole Club web site for the latest updates and description.