The thing here is that the pitches are only short ones.
The longest is the one up to what I call the SRT flats with the rock drill carcass. Its 40 feet, but I originally free climbed it.
The rise was blocked with rotten collapsed ladder and I did a sort of running lifeline off the air pipe and physically smashed my way through the collapsed ladder.
The next pitch is only about 20 feet but when originally gained with Heb it was a real chamber of horrors.
The last pitch up to the high level is the dodgiest in my estimation, I hope that the original frayed yellow rope has been replaced. I free climbed that originally, nice section of unsupported archwork to pass.
It was my biggest mining adventure. I can remember one Sunday up at about 5.30, driving up, underground for 10.5 hours, then back down the M6.
There is a write up I did. I was going to update it as it was commented that it was difficult to locate where I am talking about from my narrative. But its been sitting on my system for years, and the high level is certainly no secret, so I am about to upload it.
EDIT
Just uploaded, enjoy your reading
;D
My avatar is a poor likeness.