Dolly Parton musical 9 to 5 is set to do-si-do its way into the West End next January, starring Louise Redknapp, Amber Davies and Natalie McQueen, here's everything you need to know about the musical before you buy tickets for its West End premiere.What is 9 to 5?The musical is adapted from a 1980 movie written and directed by Colin Higgins starring Dolly Parton. The country music legend wrote her now-signature song for the film, which has been voted one of the funniest 100 American films.In...