In reply to Chris Wright:
Yep this has come up several times before - could someone make a small map and pin it to the fence by the old cut through to the lorry park next time they go up?
The new route is way nicer than the old one - just don't get lost on the way back (if you encounter a decent barbed wire fence alongside a ditch just follow it to the road - don't attempt to cross it the ditch is a man-eater)
The change in access was reported to the BMC RAD <ages> ago but the old description remains - if anyone knows how to get this changed it might be a good idea.
The lorry park guy is nice but must be getting mighty exasperated by this by now - the only place the old instructions remain is the RAD (and old books).