No one remotely acquainted with Matthew Bourne's work should be surprised to find him creating a theatre piece for the National. He has always been an ideas man first, a dance maker second, baffled by critics who griped that his dance vocabulary was limited. Dance was never entirely the point. Play Without Words: The Housewarming is the fifth and last of the NT's Lyttelton summer-season commissions. Bourne, working with his re-formed company New Adventures, responds to this up-close focus with a finely nuanced domestic drama with only five characters. But in an intriguing reversal of the tactic commonly used in small-scale productions – ie doubling up when there are too many parts to go round – each of his five dramatis personae is represented by two or even three performers at once.