Since its inception in the first part of the 20th century, the cinema has been a staple of British entertainment. The multiplexes of the 21st century have enjoyed a resurgence following the nadir of the 1980s and early 1990s, but the real golden age of cinema came with the development of the “talkies” in 1927 and the subsequent boom in the construction of new cinemas in the 1930s.

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.