I ticked it on a lovely crisp, snowy Boxing day three years ago. The entrance was in a shakehole adjacent to a shored up scaffolded hole - I'm not sure what this is, or indeed if it is still shored up and scaffolded!
My records show a 40m rope for the entrance pitches rigged from a stake to a succession of hangs requiring 7 krabs. A blocky wriggly crawl follows to the next drops which require a 30m rope starting with a thread and requiring 4 krabs. It is all eco bolted. This lands you in the lower parts of Grange Rigg next to some good formations. That was as far as I went.
Hope this info. is of use, and, more to the point, accurate! Make sure there is a knot in the end of your ropes, just in case!