Which Dragon's Den investor was known for building the Bannatyne health-club group?

Duncan Bannatyne was known for building the Bannatyne health-club group.

Bannatyne is a Scottish entrepreneur who expanded from earlier business ventures into health clubs, hotels and spas. The Bannatyne Group became one of the best-known health and fitness businesses associated with his name. His commercial background helped shape his television persona as a Dragon who often focused on valuation, profitability and the practical operation of a company.

He was part of the original era of the British Dragon's Den panel and became one of its most recognisable investors. Bannatyne left the regular programme in 2014, after which other Dragons occupied his seat.

The group is sometimes confused with individual gyms or with another investor's portfolio. The question points to the wider Bannatyne health-club group, rather than a single venue. His name is also distinct from Peter Jones, whose major business interests have centred more on technology, communications and investment.