It was a dark and gloomy morning as Ethan Walker, Michelle Kim Theisen and myself huddled in a quiet corner of Llanberis's bustling V12 Outdoor climbing shop in the heart of Wales's Snowdonia National Park.

With so much of the wall to see we recruited the help of author, guide and Hadrian’s Wall expert, Mark Richards to take us along for the day on one of his favourite routes.