Guest Stars Chukwudi Iwuji as Alex 'Zander' Hale Mollie Cowen as Matilda 'Tilly' Stern Toby Oliver as Vinnie Stern Elizabeth Roberts as Liv Stern Ellora Torchia as Maggie Lavelle Kobna Holdbrook-Smith as Vicar Glen Peters Afolabi Alli as Sean Bainbridge Maya Sondhi as Dawn McKenzie Jay Saighal as Michael McKenzie Anna-Maria Everett as Donna Ahmed Jamal as Miles Butler Shobu Kapoor as Annie Butler Nicholas Gleaves as Bill Graham Claire Rushbrook as Foreign Secretary Emma Graham Bryan Dick as Ramsey Sawyer Brian Croucher as Bobby Steve Edge as Matthew Royston Uncredited Deborah Rock as Lawyer Marian Lorencik as Management