Having heard on the grapevine that there had been another collapse on Hucklow Edge, I took the dog for a walk this morning and there's a fence appeared around the site of the Have-at-all Mine engine shaft, and the bottom of the collapse cone has disappeared.
I'll post some photos later after I've extracted them from my phone and resized. I also noticed that the great hole at Slater's Engine is mostly refilled now.
Follow the horses, Johnny my laddie, follow the horses canny lad-oh!