Lab director Andy Parker smashes particles with the world’s largest particle accelerator, the Large Hadron Collider, in Geneva. He shows Michael the LHC’s forerunner, the accelerator with which John Cockroft and Ernest Walton made the first controlled splitting of the atom in 1932. In Impington, to the north of Cambridge, Michael investigates the progressive architecture of the village school and finds it was built by the founder of the Bauhaus school, Walter Gropius, in the 1930s. Michael Portillo with Sir Mark Prescott at the National Horse Racing Museum, Newmarket, during episode 10 of Great British Railway Journeys series 12. - Credit: BBC/Naked West/Fremantle