Clare Balding and the head of Ordnance Survey, Nigel Clifford walk along Wayfarers Walk from Coombe Gibbet to Highclere, on the Berkshire, Hampshire Border. In this series Clare talks to those involved in epic walks of many consecutive days and covering many hundreds of miles. Clare and Nigel talk about the joy of poring over maps while planning such adventures.
They are accompanied by Clare's dog Archie, who particularly enjoys their lunch stop.

Producer: Lucy Lunt.