Guest Stars Oscar Kennedy as Young Liam Sam Bottomley as Ralph Roberts Aqib Khan as Adnan "Addy" Masood Shaun Thomas as Tom "Craggy" Cragg Georgia May Hughes as Lucy James Dryden as Mr Dreyfus Rosie Cavaliero as Linda (Liam's Mum) Neil Edmond as Simon (Liam's Dad) David Mumeni as Toby (Liam's Boss) Róisín O'Mahony as Carly