On the third of July 1938, the superbly streamlined A4 Pacific class steam locomotive Mallard set a world speed record on the East Coast main line of 126mph, a record which still stands. Since then millions of people have seen Mallard, either at the Science Museum in London or, more recently, at the National Railway Museum in York. Now, some 65 years on, Don Hale tells the full story of how the record came to be broken.
