Summary Of all of London's sights, perhaps the double-decker bus is the one most remembered by any traveler to the city. David seeks to discover the history of this grand four-wheeler. He manages to track down a member of the team who designed the Routemaster bus. At one time, over 2,800 of these double-deckers transported people to all parts of London. Retired Engineer Colin Curtis tells David how the Route Master came about and why it served Londoners for four decades. David also finds a group of ardent enthusiasts who have teamed up together to restore London buses past and present. We also get a glimpse of a horse drawn vehicle from Victorian times followed by nostalgic reminiscing over the city's long gone trams and trolleybuses. David then takes a ride on the underground in the north of London and meets a fellow train spotter. While strolling through the suburb of Enfield, he can't believe his eyes: standing before him is an old Finnish steam engine. Finding out how it got there takes David into a timber yard from where businessman Nigel Sill leads us on to find even more of these beauties in other parts of the city. The trek finally leads to an ambitious society of people dedicated to restoring a forgotten part of the London underground railway.

• Documentary