on a43mcdonald’sroundabout, trace west for approx 0.75 miles to start in slip road entrance to swinneyford farm in line with ‘clearway end’ sign. proceed west to take third slip road signed syresham. at t-junction turn right (caution s&m) (5.725 miles). continue to old a43 (m) where turn right; proceed to rejoin the a43 (caution) (6.45 miles). continue on the a43 to slip road signed for silverstone (7.703 miles) (s&m). proceed through silverstone to finish in line with the second tree after brook bridge, 650 yards of roundabout at whittlebury junction.