The year 2004 saw two hundred years of railways in Great Britain and to celebrate this historic landmark year, dedicated train enthusiast Mark Williams traveled the length and breadth of Britain in an exciting new TV series. Travelling the length and breadth of Britain, Mark tracks down the nation's fascinating railway heritage and gets to grips with locos such as the magnificent 160 ton Duchess of Sutherland. From the earliest designs of Richard Trevithick and George and Robert Stephenson to the advent of Class 31s, and from the development of London's Underground to the evolution of railway coaches, he reveals how our railways have changed over 200 years of history.

• Mark Williams