I've downloaded the form, so I'll get it filled in. I'll also have to pop round to my old 4x4 group to see if they know about it. The long sandy land off the A57, I used to know as the Roman Road was a regular run for us, it starts with the worlds shallowest ford over a concrete bridge thing at the Northern end of the road, near Gilliot Hey Farm on the map.
The other lane was known to me as the 'little bridge'. It was a pain to get on too, as we all would park in the nearby car park or turn around at Hagg Farm, whilst one member walked to the gate, and then we would very quickly cross the road and drop down the steep slightly rocky lane until the last vehicle had crossed the Snake Pass and shut the gate. We would then drive down the lane under the heavy tree cover, cross a very narrow bridge before driving eastwards alongside of the river, before doubling back on ourselves a couple of times in the rutted, and often muddy climb up the hillside to the eventual top of the lane near Hope Cross before driving the Roman road to Harrop Farm and then a few more lanes towards Bamford, or over to Chapelgate and Roych Clough.
It's been a very long time since I did any proper green laning. I just sort of drifted away from it.