Thanks for the info Peter. As I do not frequent the Darkness below site was completely unaware, of your efforts.
Perhaps, some one in your group could suggest that this less accommodating attitude, may just rebound on them.
By this I mean, these public quarrying companies, are always up against the NIMBiES and others, so when they go to a planning meeting they will looking for all the support they can get!
Whilst I am stating that you should directly inform them of this, it should definitely be part of any strategy.