PICTURE: The Sir Nigel Gresley, which holds the British post-war steam speed record of 112mph, and sister locomotive to the famous Mallard.

and for moderating the speed in the descent of goods trains on gradients of 1 in 260. Indeed, the injection of steam alone has been effectually applied to light trains on a short incline of 1 in 22.

The iconic Flying Scotsman steam train first entered service ... service in 1928 and became the UK's first locomotive to officially reach a speed of 100mph six years later. Considered the world's ...