Which Dragons' Den investor joined the British panel in 2022 after co-founding Social Chain?

Steven Bartlett joined the British Dragons' Den panel in 2022 after co-founding Social Chain.

Bartlett became a dragon for the twentieth series, which began airing in 2023. He co-founded the social-media marketing agency Social Chain with Dominic McGregor in 2014. The company grew from a social-media-focused start-up into an international marketing business.

His appointment made him the youngest dragon in the programme's history at that time. Bartlett also became widely known as the host of The Diary of a CEO podcast and as an author and public speaker, but his Dragons' Den role is based on his business experience.

Nick Jenkins, Piers Linney and Richard Farleigh are different former or current investors associated with the franchise. The question identifies Bartlett through both the business name and the timing of his appointment, avoiding confusion with the many entrepreneurs who have appeared as contestants rather than dragons.