Paragraph 20

From a point 390 metres or thereby west, north‑west of point 13 in a clockwise direction for a distance of 315 metres or thereby returning to the same point 390 metres or thereby west, north‑west of point 13 forming a circulatory carriageway of the roundabout as shown by a heavy black line between the points marked “point AF”, “point AG”, “point AL”, “point AM”, “point AD” and returning to the same “point AF” on the plan.