Map Reference

One of the challenges I've given myself for this year is to walk the Chiltern Way.  It's a circular route of around 200 km (125 miles), and most of it is easily accessible by public transport from where we live, so it should be fairly easy to do it in short stages over the year. I'm looking forward to planning it as well as doing it - first step was buying this OS map of the north part. It comes with a free digital version which can be downloaded to your mobile phone - how things have changed since my first lessons in map-reading back in the 1960s!