Take the Devizes Road (A342) out of the centre of village (Ship Inn). After about a quarter of a mile, at the T Junction with the A345/A342 (Near Farriers Field estate road on right) turn LEFT at the T junction, then IMMEDIATELY RIGHT up a tarmac lane (with a 330 MPH sign at the entrance). Drive for about 1 1/2 miles to an open parking area near to an army 'check point' block house (99% unmaned).