London's Blue Badge Tourist Guides often have to take groups to West End theatre shows and, even if they do not do this regularly, it is a good idea to know what is running in Theatreland in order to advise people. With this in mind, I thought it would be fun to see which were the longest running shows on the London stage. I wonder if we are now reaching the stage of the permanent play - as much a part of the London tourist scene as the Changing of the Guard.

For many visitors to London, one of the iconic sights of a trip to the capital is a traditional London red double-decker bus. Known as a Routemaster, these buses was designed in the late 1940s and manufactured until 1968 when production stopped, mainly because their open back doors – which were one of the attractions for many Londoners – made them unusable by those in a wheelchair. They were still used on many routes until the early twenty-first century and some can be seen occasionally on routes such as the Routemaster Heritage Route 15 which runs from Blackwell to Trafalgar Square.