START on the A40 Witney By-pass at the western end of the first lay-by after the Cogges exit and about a mile west of the Hill Farm over-bridge and the eastern end of the dual carriageway, 177 yards west of and beyond kilometer post 106.9 by the last green cats eye before the end of the lay-by Proceed westwards to the Asthall roundabout. 288101 TURN by circling the Asthall roundabout, past the exit to the A40, the entrance from that road and the junction with the B4047 to take the third exit back onto the A40 eastbound past the P sign on the corner. (Check). 5.792 Proceed eastwards on the A40 past the slip road from the Brize Norton and Minster Lovell Continue past the exit to Central Witney and A415 junction slip road and cross the bridge over that junction. Pass the end of the slip road from that junction. FINISH at a drain where the next metal barrier first attains its full height, about 25 yards east of and beyond a green "A40" sign on the verge.