We follow the Flying Scotsman, the world's most famous steam engine, as it returns to the tracks following a ten-year restoration which cost more than £4 million. We climb on board and join the celebrations as the 93-year-old engine sets off on its inaugural run from Kings Cross Station in London, pulling a train-load of enthusiasts and supporters 200 miles north on the mainline to York and the engine's home at the National Railway Museum.
