Hi Upper Bincliffe is still accesible, just a tight squeeze to access the shaft!
The first volume does contain about a dozen innacessible mines, along with the sixty or so others that are listed as accessible. These are mainly included as their was little reference to them in previous literature, and also because i live locally and wanted to be comprehensive in my coverage.
The next three volumes also contain a few mines which are officially innacessible, but if you read under the lines they are in there for a reason.
The books are all privatley published, and with the full colour plates and card cover etc. they were quite an expensive job. In fact i dont even make £1 on each sale! I wrote the books for the love of it and because when i started exploring their was no easily accessible guide such as these available.