Since the first original Routemaster retired from London routes in 2005 though, it's tricker to thumb a ride on these pillar box red buses ... The Londoner Bus Company also run tours of London ...

We went along on London's new free bus tour specifically for dogs. The sightseeing tour went past some of the city's most famous landmarks, as well as popular dog-walking spots such as Hyde Park ...

The big red double-decker bus has been a stalwart of London life and a globally recognised symbol of the city for over 100 years. In those 100 years, those buses have gone through several iterations.