West End producers are itching to get their hands on the new show at the Bush. Mama Mia’s director, Phyllida Lloyd, takes charge of a script written by the Torchwood actress Cush Jumbo about the world’s first black female celebrity. Josephine Baker was born to wow the crowds. A child cabaret artiste from St Louis, she performed as a chorus girl in New York and then leapt the Atlantic to become the toast of Paris in the 1920s.