I would very much like to have a peer into the old section.
http://www.monkton-farleigh.co.uk/Fauld%20pictures%20nine.htm Good link there ^^^^
Any previous talk about having a look has attracted huge hand wringing due to it's subsequent "grave" status. As that series of pictures show, the HE store which got torn to atoms was actually extensively rebuilt. Emotional hand wringing and "you'll get blown up" aside, it looks like a seriously interesting place to have a poke around.
There was one chap who maintained there was an entrance into the workings from the crater. Sadly, just when the topic was getting really interesting, with odd photos of "stuff" in the crater, the hand wringers came out and got all authoritarian about it.
Anyway, Old Fauld Mine has to be one of the potentially riveting explores possible. Contrary to popular hysteria, it would be unlikely you were climbing over bodies and unexploded ordnance.