NCN route 20 used to be continuous on the OSM, as it is on the ground and on Sustrans site, checked from Wandsworth to Carshalton and on to Oaks Park. Several sections appear to be missing on OSM: http://www.openstreetmap.org/?lat=51.4045&lon=-0.1829&zoom=12&layers=C Does anyone know what happened? Is there a simple fix? Trevor