Trying to extend the National Cycle Route 61 from St Albans via Hatfield towards WGC. Unfortunately, soon after entering Hatfield to begin the new mapping, I managed to lose the route with the result that I spent 20 mins randomly cycling through Hatfield trying to pick it up again. Managed to find it again for a short while, then lost it. While trying to pick it up for the 2rd time, I found part of NCN 12 so contented myself with extending it southwards. All this cycling my be good for my health, but bad for the OSM cycle map :(