A tribute to some of the most iconic of all British locomotives, published to celebrate the 70th anniversary of Mallard's record breaking speed run in 1938.

Just over eighty years ago on the East Coast main line, the streamlined A4 Pacific locomotive Mallard reached a top speed of 126mph – a world record for steam

Colin Alexander looks at the interwar period, a high-water mark in industrial design as the benefits of streamlining were realised.