Hi,
I find got around to visiting Woodcroft quarry again last night, it's really not as hard to get to as people are making out. We parked near Old School Lane on the small layby and it took us around 15 minutes maximum to get into the quarry as you can just join the bottom of the Fly Wall from Off-Dyke's path and avoid going down to the river and back up again.
We did have a quick look at the original access and we think it would be possible to squeeze through the hole in the barbed wire but we didn't bother as it looked a little akward and we had already parked down the Off-Dyke's path entrace.
I've updated the access information on the UKC page accordingly:
"Walk in on from the Woodcroft end, take Off-Dyke's path (from the entrance near Old School Lane) and follow the lower path along the river, initially you will see the Forbidden wall on your right, keep going as the path heads away from the cliff, but when it gets closer again you will see the far end of the Fly Wall near Joe's and The Fly.
For the Fly wall and Woodcroft Quarry head towards the rock and follow the poor Flywall path all the way along until it reaches the end of the Fly Wall where you can turn right and walk up to Woodcroft Quarry (heading down here leads past the Screed Slope to the bottom of the Go-Wall).
For the main cliff it maybe easier to stay on the footpath, crossing the Screed Slope at the bottom (easy) to each the bottom of the Go-Wall.
"