As The Traitors final airs, Prof Richard Wiseman – a psychologist and magician – says telling a good lie is ‘very difficult’

As The Traitors final airs on BBC One, a show in which the faithfuls battle to expose the traitors to win a cash prize, we spoke to an expert in the psychology of deception on how to lie.

Richard Wiseman, a professor of the public understanding of psychology at the University of Hertfordshire, has an interest in deception both academically and professionally – he doubles up as a professional magician.