Another Webber classic, based on T S Eliot's Old Possum's Book of Practical Cats. It came to life in London, on May 11, 1981 debuting in Broadway a year later. Now, 8,949 performances in London and 7,485 performances in New York later, Cats is among the longest-running musicals in both Broadway and London history!

It has seeped into popular culture too, with references to the musical cropping up in all kinds of movies and sitcoms. And yes, Memories is still a school favourite for many.