Writer: Caryl Churchill Director: Lyndsey Turner Caryl Churchill is one of our premier science fiction writers, a fact which isn’t celebrated enough. Like all the best SF, Churchill’s work takes futuristic concepts and weaves stories that talk to us in the present. 2002’s A Number is perhaps the most obvious of her works to fit this description. Paapa Essiedu’s Bernard finds his world tilting on its axis when he discovers that there are clones of him walking around. As he discusses the revelation with his father, Salter (Lennie James) the pair start to disagree on whether the clones are new…