Going back to the case of Longstone Edge, the major issue there was that there was an attempt to use a 1950s planning permission to extract spar to instead open a quarry and sell the limestone rather than the spar; what little was found at Backdale was just piled up in the yard. Had the permission been used to chase Deep Rake westwards with backfilling like the other major spar excavations on the edge, there wouldn't have been much of an issue and as Jim rightly points out, the backfill would likely regenerate to an ecologically diverse and interesting community as has happened in the Red Rake/Catsall Rake area of Peak Pasture.