Duncan Bannatyne left the Dragons' Den panel in 2014.
Bannatyne was one of the programme's original Dragons and remained on the panel for many series. His departure came after a long television run in which he became known for forceful negotiations, memorable catchphrases, and investments across consumer and service businesses.
He was replaced by entrepreneur Nick Jenkins, the founder of online greetings-card company Moonpig. Jenkins joined the panel for the programme's twelfth series, following Bannatyne's exit.
The year can be confused with 2013, when other changes affected the Dragons' Den cast, including the arrival of Kelly Hoppen. It is also distinct from the year Bannatyne left some individual business roles. The question asks specifically about his departure from the BBC investment panel, not his retirement from entrepreneurship.