LONDON — Broadway favorite “The Book of Mormon” has locked down a West End berth for 2013, one of several widely anticipated moves in the West End’s legit winter 2012/13 season.Produced in the West End by Anne Garefino, Scott Rudin and Sonia Friedman Productions, “The Book of Mormon” will preview at Cameron Mackintosh’s Prince of Wales Theater from Feb. 25, 2013 with a March opening yet to be confirmed. Tickets go on sale for the production, whose casting has yet to be announced, from Sept. 13. The Prince of Wales is currently home to “Mamma Mia,” which moves Sept. 6 to the Novello theater. The gap between that and “Mormon” will be filled by a limited London run for “Let It Be,” the Beatles concert show previously produced in Gotham as “Rain.” The West End run is produced by Jamie Hendry Productions, Annerin Productions, Rain Productions, BB Promotion, MagicSpace Entertainment & Julian Stoneman Associates. Chekhov will also be returning to the West End via a new production of “Uncle Vanya” produced by Kim Poster for Stanhope Productions, Nica Burns, Robert Bartner and Max Weitzenhoffer. Helmed by Lindsay Posner, the production stars Ken Stott, Anna Friel and Samuel West in a translation by Christopher Hampton at the Vaudeville Theater Oct. 24-Feb. 16 with a Nov. 2 opening.