Good. I never realised that the BBC would even notice something like that.
For a number of years I used to visit the Dylife area around Easter, and puzzled over some of the features. For instance, part of the stream was diverted into the Gwaith Gwyn adit, which slopes downwards, and down a shaft therein, but I never did find out where it emerged.
Also the tunnel beneath the road is strange. The road was not there originally, so why the tunnel, and the iron pipe?
My biggest disappointment was the major blockage in the Llechwed Ddu adit at Alfred's shaft (I would like to see them clear that!), but I did have to wait for a dry Easter to get there conveniently, without wading through three feet of water. That would have been the same Easter that I finally saw the shaft in Gwaith Gwyn adit. Dfngwm was far too wet to even think about, but nothing that some clearance of spurious debris around the entrance would not fix, I think.
So I am looking forward to the forthcoming book with very great interest.
By the way, Llechwed Ddu is a good place to take complete novices in dry weather, to get the feel for being underground. No need to take them too far, as it gets low and muddy towards the blockage. But then they can go over to Dfngwm to admire the scenery, the valley or gorge upstream is rather nice on a sunny day, and rarely visited.
But I never did find the level downstream of the wheelpit, whose name I can't remember right now. Must get back there some time, but from what I hear, the Star Inn is not the place to stay.
Alan