Darlington to DunbarIn Newton Aycliffe, he tests a state-of-the-art passenger train on tracks which follow the route taken by George Stephenson's steam engine on its historic journey in 1825. Through the looking glass at Croft-on-Tees he discovers a curious potion at the childhood home of Victorian writer Charles Dodgson, better known as Lewis Carroll, and finds the author was also a fan of Bradshaw