K.J. Yossman One Direction star Niall Horan is set to cameo on rail-themed Channel 4 digital series, “Trainspotting with Francis Bourgeois.” Produced by Untold Studios, the series sees TikTok creator Bourgeois introduce celebrities to the obscure hobby. Horan will join Bourgeois for a “day of locomotive escapades” starting at Liverpool Street Station in London – but will a series of train cancelations and delays scupper their plans? During the episode, which is available from June 14 on Channel 4’s YouTube, Horan reveals a very personal connection to trains, telling Bourgeois that his grandfather was a train driver. Movie buffs will also be thrilled to discover Horan’s grandfather drove the train in “The Great Train Robbery.”