Ok guys, I am also liasing with tomh, as he knows quite a few of you that I have not met, as he says it's like herding cats, I dare say we will find a common denominator though and then we can all meet up, if anyone wants to drop the shaft then that's fine so long as you have the correct gear etc to do so, if dropping the shaft you will need wellies, if not then you won't as the surface of the site is pretty dry, if you drop the shaft but intend to come out via the portal then I would recomend knee pads, you will get wet legs if not waterproofed upto the waist if exiting via the portal.
Usual site and u/g rules apply, last time someone was in there wasn't that long ago, I was told that the air down there was ok at that time, situations can change as you probably know so be aware.
The threat of heavy rain would make it a no no for underground due to the layout of the place.
Lozz.