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 on Friday, in which the Faithfuls battle to expose the Traitors to win a cash prize, we spoke to an expert in the psychology of deception about how to lie.

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