The London & North Eastern Railway was one of the "Big Four" Railway Companies formed during the 1923 Grouping Act in Britain. As such it barely lasted 25 years, but in this time left a prestigious mark in British railway history. Routes varied from the flat agricultural land of East Anglia, to the severe curves and gradients of Scotland and the Pennines. Atfer WWII it was Nationalised to become part of British Railways (BR).