Over many years, I have visited just a couple of the mines, namely; FACIT(Britannia)MINE, Whitworth(Twice) and more recently, SCOUT MOOR MINE, Rawtenstall. I noted recently on 'Adit Now' the small, Longbank Sandstone Mine, Rawtenstall.
I have heard of the Great Heights Stone Mine, Cowpe Lowe, but not visited. I have also seen a picture, titled 'Stone mines at Crutchman Quarry, the obvious entrance is locally nicknamed Gamblers Caves' on 'Valley of Stone' website.
Any information on 'Great Heights' & 'Crutchman Quarry' appreciated and on any other flagstone mines in this area.
Many thanks,
Spires.