Guest Stars Eloise Thomas as Teenage Becky Gia Hunter as Teenage Chloe Phoebe Nicholls as Tiggy Amanda Lawrence as Angela Natasha Atherton as Tara Laura Regan as Georgia Cowan Estella Daniels as Christine Noel White as Jim Tilda Wickham as Bea Kiera Lester as Daphne Daniel Betts as Mark Peele Orlando James as Callum Alexandra D'Sa as Cathy Tom Espiner as Michael Hapley Rose Reade as Receptionist