Start on the Aylesbury road, Great Missenden, opposite a drain, approximately 80 yards from the junction with the A413 at the northern end of the Great Missenden by-pass. Proceed to the A413 where turn left (care) (M1) to the roundabout at the southern end of the Wendover by-pass Take the second exit (M2), still on the A413 to the roundabout at the junction of the A413 and the B4009. Circle the roundabout, (M3, M4 & M5) and retrace along the A413 to the roundabout at the southern end of the Wendover by-pass Take the second exit (M6) on the A413 and continue to the roundabout at the junction with the link road at Great Missenden. Continue on the A413 through the double roundabout to the roundabout at Shardeloes Circle the roundabout (M9 & M10) and retrace on the A413 to the roundabout at the junction of the A413 and the B485 Continue through double roundabouts (M11 & M12), still on the A413, to the roundabout at the southern end of the Wendover by-pass Circle the roundabout (M13 & M14) and retrace on the A413 to finish on the A413 at a point three (3) yards beyond the triangular right turn sign into Aylesbury Road, Great Missenden, 8 yards before a sign A4128 closed to13 vehicles of 25 tonnes.