Guest Stars Orla Bayne as Young Holly Ella-Rae Smith as Phoebe Parker-Fox Izuka Hoyle as Dani Richard Gadd as Ben Imogen King as Rayna Daisy Littlefield as Lisa Madeleine Worrall as Agnes Reid Grace Greatorex-Watson as Milly Sonny Flexen as Will Niall Bayne as Sean Michael Nardone as Alec Faye Castelow as Hettie Donald Pirie as News Reader Thoren Ferguson as Matt Saskia Ashdown as Sarah Gavin Paul as Lawyer Laura Lovemore as Desk Sergeant Rachael Keiller as Journalist