Start in the middle of the long layby immediately East of the Petrol Filling Station in the middle of Woolhampton, 10 metres west of lamp post WN27. SU578667 Exit the layby and head East along the A4. Go straight across the roundabout at the junction with the A340 1.7 miles SU603676 (care, traffic from the right) to a short dual carriageway. Continue past the dual carriageway to the large roundabout at Theale, junction of A4 and A340, 4.5 miles, SU632706. Circle the roundabout and retrace along the A4 to go straight across the A4/A340 junction/roundabout. Continue on through Woolhampton on A4 passing the start and exit the village (care light controlled pedestrian crossing). Continue on to the Kennet Park roundabout at the junction with Gables Way (Turn) 11.33 miles SU541668 Circle the roundabout and retrace along the A4 to go straight across 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) 18.17 miles SU632706. Repeat the above circuit (lap 2) between Pangbourne Lane and Kennet Park roundabouts. 31.84 miles. Repeat the above circuit (lap 3) between Pangbourne Lane and Kennet Park roundabouts. 45.5 miles. Circle the roundabout and take the fifth exit to retrace along the A4 westwards, go straight across the Aldermaston roundabout at the A4/A340 junction SU603676 Finish on the south side of the A4 directly opposite the start. 50 miles SU578667