Guest Stars Emma Cunniffe as Sydney Olivia Vinall as Julia Blythe Jennifer Hennessy as Bryony Beckett Anna Francolini as H.J. Keane Danny Ashok as Luke Strand Caroline Lee-Johnson as Bella Gayle Yolanda Kettle as Joy Pelling Kate Lamb as Lindsay Storm Alice McMillan as Charlotte Hedge Adelle Leonce as Erika Teresa Banham as Barbara Cooke Katya Martin as Zoe Downs Michael Shelford as Barry Errera Anna Acton as Stella Faber Crystal Clarke as Nadia Baker Endy McKay as Louise Nathan Ives-Moiba as Raymond Gann