Guest Stars Natasha Raphael as Irene Edwards Beth Bradfield as Jean Dunlop Imogen Lamb as Mary-Lou Linnett Jennifer Wigmore as Miss Grayling Minti Gorne as Felicity Rivers Ashley McGuire as Matron Genevieve Beaudet as Mam'zelle Rougier Saskia Kemkers as Emily Lake Twinkle Jaiswal as Katherine Imali Perera as Miss Potts Hannah Saxby as Pamela Flora Dawson as Mrs Rivers Naomi Sheldon as Mrs Lacey Rob Carter as Mr Rivers