Start on the A4, approximately 4.5 miles west of M4 junction 12, at the western end of a long lay-by on the South side of the road approximately 50 yards west of the junction with the A340, and approximately 100 yards short of the minor road junction to Aldermaston station - 58 yards short of the lay-by end and 80 yards short of lamp post No. 92. 0.000 603675 Go west along the A4 through Woolhampton to go straight across the Kennet Park roundabout and continue on the A4 to the next roundabout at the junction with Pipers Way on the south. (Turn) 4.605 532673 Circle the roundabout taking great care to watch for vehicles emerging from Piper’s Way and from the A4 out of Thatcham, and retrace along the A4 to go straight across the Kennet Park roundabout to continue on the A4 going through Woolhampton. Continue past the start point on the south side to go straight across the Aldermaston roundabout at the A4/A340 junction (care, traffic from the right) to a short dual carriageway and on to the large roundabout at the junction with the A340. (Pangbourne Lane) (Turn) 12.113 604675 Circle the roundabout and take the fifth exit to retrace along the A4 westwards to go straight across the Aldermaston roundabout at the A4/A340 junction 15.000 532673 Continue through the start point and Woolhampton, going straight across the Kennet Park roundabout to the roundabout at the junction with Pipers Way on the south. (Turn) 19.605 Circle the roundabout, taking great care to watch for vehicles emerging from Piper’s Way and from the A4 out of Thatcham, and retrace along the A4 Eastbound through Woolhampton. 604675 Continue past the start point (on the south side) to go straight across the Aldermaston roundabout at the A4/A340 junction into the short dual carriageway where after 548 yards and at a point on the north side at the centre of a gateway to a field with a metal lead-in