1 The Mousetrap:

The Agatha Christie murder mystery opened in November 1952 and is still running.

2 Les Miserables: Opened in London in 1985 and still going strong.

3 The Phantom of the Opera: The Webber/Rice classic opened in 1986 and has so far been performed more than 11,200 times.

4 Blood Brothers: Ran from 1988 to 2012 with more than 10,000 performances staged.

5 The Woman in Black: Still running after opening in January 1989.

6 Cats: Between 1981 and 2002, it clocked up almost 9000 West End performances.

7 Starlight Express: It closed in 2002 after more than 7400 shows were staged in the West End.

8 No Sex Please, We're British: It ran from 1971 to 1987 and was staged on 6761 occasions.

9 The Crazy Gang: The zany comedians packed theatres from 1947 until 1962.

10 Chicago: It opened in November 1997 and closed in September 2012, after 6187 performances.