I was in there last Monday evening and can confirm open adit entrance - theres an old gate in the oil drum which looks like it hasn't been closed for years. The crawl to the first pitch into the coffin level is very much flat out in a puddle for the first couple of metres so expect a wetting. Pitches are short and entertaining and Eco bolted. We had a fairly brief look around the bottom levels, identifying the base of the Engine Shaft and Climbing Shaft and the interesting coffin level in the roof plus a bit more heading towards Knotlow.
We looked at the entrance shafts on the surface. Both are secured by nuts so a Derbyshire key would be required. The Climbing Shaft has a note on it informing of unstable ginging and requesting folks not to use it until it has been stabilised.
I really enjoyed the trip. It has some great features, and will undoubtably be back as there is plenty more to do on a second visit.