World War Two was a very interesting time for the British railway network. It put a huge strain on locos, rolling stock and the infrastructure, but it was also interesting in that many US locos were shipped here, plus thousands of flat and box cars. They were used on the UK network prior to the invasion and then were shipped to Europe as so much European rolling stock was destroyed by Allied air attacks. There's a Baldwin S160 loco in a local museum here, that was used in Leeds, in the North of England prior to the invasion. Everything was run down, pushed to the limit, temporary repairs and that makes things look more interesting on a model.