Although we are outside the zone it is very close and you should only follow the route given below to avoid passing through the zone:
From M25
take J18 and follow A404 towards Rickmansworth
First roundabout - turn right (A404)
Second roundabout - continue on A404
Third roundabout - turn right (A404) and over canal bridge
Fourth roundabout - turn right (A404)
Continue up steep hill for about 2 miles until you see a pub on your left - Ye Olde Greene Manne.
Turn right into White Hill (almost opposite). After 1 mile there is a sharp S bend followed by a road off to
the right. Stay on main road and Littlebourne is on your left (opposite a bus stop)
From A40
Leave A40 and take M25 at J1a (signposted Watford) then follow directions given above.