A feast of first generation diesel locomotives show the variety of motive power employed by British Railways, from the small diesel shunter to the mighty Deltic locomotives of the East Coast Main Line. By 1965 British Railways operated the largest diesel fleet in Western Europe. Close co-operation between the locomotive manufacturers and the railways had led to the development of many different types of engine for different purposes - providing enthusiasts with a much-missed variety of traction compared to today's railways.