Guest Stars Natalie Brown as Kate Barrett Tara Rosling as Andrea Barnes Seeta Indrani as Deena Howard Lauren Coe as Kaylee Hobbs Aaron McCusker as DCI Leo Turner Graham Abbey as Benjamin Barnes Co Starring Emily Bowker as Laura Watson Roderick Hill as London Police Officer # 1 Hannah Hutch as Lucy Amber James as Brianne Uncredited Ayari Radhouane as Conference Security Guard # 2 Endre Papp as London Police Officer # 2