Production photos have been released showing Zizi Strallen, Charlie Stemp and the cast of Mary Poppins at the Prince Edward Theatre in the West End.Based on PL Travers' novel, the musical tells the story of a British family which is visited by a magical nanny, and it features original songs by George Stiles and Anthony Drewe, as well as the Sherman brothers' classic tunes such as "Supercalifragilisticexpialidocious", "A Spoonful of Sugar" and "Let's Go Fly a Kite".Directed by Richard Eyre and...