Ewan McGregor and Sophie Okonedo are part of an ensemble cast in this multi-stranded tale of Londoners indulging in relationship angst (and a bit of something else) on Hampstead Heath. Sexually charged interactions add to the heat of a summer afternoon, but first-time director Ed Blum spares us the graphic details and instead focuses on the characters' emotional dysfunctions. Scenes work best when aiming for laughs, like Tom Hardy striving to be a cockney Casanova or Gina McKee in stilted conversation with Hugh Bonneville during a blind date. At other times, Blum shoots for a melancholy tone but, given that he's juggling over ten minor intrigues, there isn't enough time to really feel for any of the characters. That said, the performances are glowing all round and enhanced by lots of casually amusing dialogue. Overall there's a free and easy ambience about the film that proves quite seductive.

Sex and love. Some seek it, some need it, some spurn it and some pay for it, but we're all involved in it. Set on one afternoon on Hampstead Heath in north-west London, the film investigates the minutiae of seven couples. What makes us tick?