From Segedunum in the east, Robson sets off on his 84-mile journey. He discovers the boyish thrill of geocaching, sees how some locals repurposed the wall for their own needs, and has a dip in the River Tyne.

Robson travels from Chollerford to Walltown Crags, and learns more about how the Romans took care of themselves so far from home. He samples natural cuisine and checks out the spa at Chesters Fort, before paying a visit to the latrines of Housesteads Fort, which were once the envy of an empire. He goes on to pit his fishing abilities against an angling rival, gladiator-style, before climbing Steel Rigg to reach the route’s highest summit.