Mallard, No. 4468, out in the sun on a siding at the National Railway Museum in York in June 2010, its garter blue streamlined casing on full show. Built at Doncaster in 1938 to Nigel Gresley's design, it is an A4 class 4-6-2 Pacific. On July 3, 1938, on Stoke Bank between Grantham and…
