In April 2013 I walked the Pennine Way – a 268-mile trek from Edale in Derbyshire up the spine of England and into Kirk Yetholm in Scotland. Almost exactly two years later, on 24 ^th April 2015 the Pennine Way reached its 50 ^th anniversary as the first national trail in the UK. To celebrate, the BBC produced a four-part series about the trail hosted by Paul Rose.