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As The Traitors prepares to launch in the US, the producer behind the series discusses why it was a hit in the UK. Also in the programme, what the Christmas period revealed about advertising, from how companies are spending their ad budgets to the ads which are working the best. Presented by Ros Atkins.

Guests: Stephen Lambert, CEO, Studio Lambert, Sophie Lewis, chief strategy officer, M&C Saatchi, Dino Myers-Lamptey, founder, The Barber Shop, Benjamin Cohen, CEO, PinkNews, and Chris Curtis, editor-in-chief, Broadcast magazine