In reply to TeddyC:
Hi Teddy
In my opinion that "Access Banned" banner on the crag web page should be changed to "Advice" immediately. (I'd do it myself, but don't want to step on your toes).
There is no legal route for a landowner unilaterally to ban responsible access to open spaces in Scotland. Misleading signage undermines the public's confidence in our hard won access rights, and should always be challenged, whether it's a physical sign saying "Access Banned" at a location or, as here, an on-line sign.
Good luck with your negotiations.