Which Dragon left the regular Dragon's Den panel after series 12?

Duncan Bannatyne left the regular Dragon's Den panel after series 12.

Bannatyne was one of the launch-era investors in the British version and remained part of the panel through twelve series. His departure marked the end of a long television run during which he became strongly associated with the programme's early identity and its direct style of negotiation.

His business background was broad. The Bannatyne Group became associated with health clubs, spas and hotels, while his earlier business interests included care homes. Those experiences shaped the practical questions he asked founders about operating costs, customers and expansion.

The date can be confusing because the programme continued for many years and featured several departures and arrivals. Bannatyne did not leave after the second or third series; he stayed until after series 12. Peter Jones and Deborah Meaden, by contrast, continued as regular investors beyond that point.