Iv been in here 3 times, all rather rushed visits, first was solo as someone couldn't contort the somewhat tight entrance
second was with my lad who wasn't keen so didn't get far in again, third was more successful with a non member friend but with torch issues still had to rush around a bit.
Its pretty unstable as signs on the roads above now warn you where not to park in case your car "disappears into a hole" but with the massive entrances there is no O2 issues normally associated with iron mines.
Its all a bit samey so here's the best of what I got.
Thanks For Looking