'The Mallard' 4-6-2 steam locomotive no 4468, 3 July 1938.
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The Mallard on Sunday 3 July 1938 at Barkston on the East Coast Main Line just prior to its record-breaking run. 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. This class A4 locomotive was designed by Sir Nigel Gresley (1876-1941), the chief mechanical engineer for the London & North Eastern Railway and built at the railway's works in Doncaster.