Ok the way i'd go is:
Come round the A14 till you hit the M11 come down the M11 and take the A10 junction off into Cambridge (should be left at the roundabout). Follow the road past Waitrose (on your left), over the 2 sets of traffic lights (the first of which is the entrance to waitrose). Past the Shell garage (cash point in there if you need money) on your left (watch the speed camera here just after), pass the Esso garage on your right. The pub should be directly after the Esso garage on the right (Green Man). The entrance to the car park is just after the pub.
Good enough?
Or do you want to come through Cambridge?
