In reply to Yorkspud: Glad you brought this up. I emailed the National Trust to ask their permission (if you like) to climb or clean routes. This was what they said:
You may be aware that Alderley Edge is one of the most significant archaeological sites of its type in the country. The main archaeological interest is related to the 4000 year history of copper mining.Unfortunately due to the extremely sensitive nature of much of the archaeology at Alderley Edge, the mines forming an essential part of the resource, we would rather people do not climb and risk damaging the extremely fragile mining evidence which still remains.
The trust does allow climbing at certain properties but only under licensed arrangements whereby the licencee needs to agree to certain conditions relating to health and safety, ecology, best practice, local conditions etc.
I appreciate the fact that you have taken the trouble to contact us with regard to this matter, it is unfortunately the case that not everyone who wishes to climb does so and I'm afraid also the case that we have experienced serious accidents in the past involving unauthorised climbing on Trust land. I hope you appreciate the need to regulate such a potentially dangerous activity.