London King's Cross To Edinburgh Waverley - The route of the 'Flying Scotsman'. The bookazine tells the story of the East Coast Main Line, the great British trunk route which links London king’s Cross to Leeds and Edinburgh, and which produced the fastest steam locomotives in the world. It includes the exploits of Flying Scotsman, the world’s most famous steam locomotive, and Mallard, which set an all-time steam locomotive record of 126mph on Stoke Bank in Lincolnshire.