Emily Watson Emma Robertson Actor, Executive Producer Denise Gough Connie Mortensen Actor Thalissa Teixeira Ness Jones Actor Karl Johnson James De Cadenet Actor Jamie Sives Karl Mortensen Actor Risteard Cooper Si Robertson Actor Eileen Davies Julia De Cadenet Actor Chizzy Akudolu Addy Smith `The Squeak' Actor Paul Chahidi Phil Cook Actor Nina Wadia Dr Anita Rhys Evans Actor Jackie Clune Leah Worthington Actor Rina Fatania Headmistress Actor Joan Iyiola Anya Adetola Actor Barbara Drennan Hattie Actor Grace Calder Savannah Actor Alex Hughes Adrian Actor James Doherty Blair Actor Islah Abdur-Rahman Nav Actor Thea Barrett Polly Actor Isabelle Mullally Annie Actor Henry Helm Josh Actor Susan Tully Director Clara Salaman Writer, Executive Producer Jack Halama Original Music Letitia Knight Producer Ruth Kenley-Letts Executive Producer Kate Crowe Executive Producer Neil Blair Executive Producer Jenny van der Lande Executive Producer