We park in a layby as indicated HERE! The start is just across the road on the A26. From the start you ride a short distance before filtering left down the slip ramp (known as the ski slope) onto the A21, heading towards Sevenoaks. TAKE CARE JOINING A21. You follow the road for over 5 miles and take the next slip ramp up to Sevenoaks Weald roundabout. Here you go all the way round and retrace back down the A21. You finish at the big road sign and speed camera, (basically where the yellow road goes under the A21/Manor farm is indicated on the map) before reaching the slip ramp back up the hill to the start. Just turn up and do it, no entering in advance.