Knotty Green is between Beaconsfield New Town and Penn.
From M40 Junction 2:
Follow signs for Beaconsfield and proceed along the A40 London Road. This will bring you into Beaconsfield Old Town. At the roundabout with the Royal Saracens Head pub on the left, turn right onto the B474 Aylesbury End, which soon becomes Station Road. Follow the road into Beaconsfield New Town, going straight on at all the mini roundabouts. After Waitrose, which is on the right of yet another roundabout, the road becomes B474 Penn Road. Keep going and after approximately half a mile, turn left at the Red Lion pub into Forty Green Road. Knotty Green CC is on your left.
Follow the B474 from Hazlemere, through Penn towards Beaconsfield. When you pass the Alfriston School on your left you are getting close. Immediately after the Red Lion pub on your right, turn right into Forty Green Road. Knotty Green CC is on your left.