In reply to Doc Oc:
As a footnote to the above, a friend who was climbing at Witches last Thursday had a conversation with the farmer who owns the field in which the quarry is situated. The farmer had noticed an increase in the popularity of the crag and was concerned to see that the conditions for access were being adhered to.
Please, if you intend to climb at Witches, make sure you can count to ten, and politely inform innumerate drivers of the location of alternative parking.