'Mallard' 4-6-2 steam locomotive, no 4468,
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Mallard' 4-6-2 steam locomotive, no 4468, 1938. This clas A4 locomotive was designed by Sir Nigel Gresley, the chief mechanical engineer for the London & North Eastern Railway and built at the railway's works in Doncaster. On Sunday 3 July 1938 the locomotive reached a speed of 126 mph on a straight stretch of track between Grantham and Peterborough, achieving a new world record for steam locomotives which remains unbroken to this day.