Adventurer Paul Rose continues his exploration of the Yorkshire Wolds Way, arguably Britain's least well-known national walking trail. The 79-mile trail starts at the Humber Estuary and ends at the Yorkshire seaside resort of Filey. In this episode, Paul takes to the skies to get a unique view of this stretch of chalk downland and gets a special invitation to a military base that's been keeping the country safe since the start of the Second World War.