I was very pleased to help out on this yesterday - a fascinating hole, and we got down roughly 8m in about four hours with some dedicated grubbing and hauling of very large boulders, scrap and skeletons. Nothing like teamwork.
That doc I sent Dan H recently by Chris Heathcote of PDMHS, of the Peak Forest liberty should have
something in it - certainly has Windle, Rush and Birch Hall mentioned. That's the one with the 110 fathom level to the natural swallow into the P8 streamway...
I doubt I'll be free again until next weekend, but keep it up folks - very promising!