In reply to nomisb:
Not only are climbers more visable, but so is chalk, particularly its overuse! Unfortunately the SWT Reserves Manger, with whom we had a good working relationship with, has just left her job, She was very concerned with chalk being used in excess. I have emailed her replacement but have yet to receive a reply. Access is a sensitive issue at Eridge; some years ago one of the SWT trustees tried to get climbing stopped but fortunately that didn't happen.
One further point is the SWT/BMC sign below Sandstorm, saying don't use chalk in this area, has broken off, but this advice is still very important.