Which Dragon's Den investor founded the health-club chain named after himself?

Duncan Bannatyne founded the health-club chain Bannatyne Fitness.

Bannatyne built a varied business career before concentrating on health clubs, hotels and spas. The Bannatyne Fitness chain developed into one of the United Kingdom's largest privately owned health-club groups, with facilities offering gyms, exercise classes and wellness services.

His entrepreneurial career began with businesses including an ice-cream van operation and care homes. Those earlier ventures helped establish the broad business background that he later brought to television investment.

Bannatyne was one of the original Dragons when the BBC series began in 2005. The chain is often described informally as the Bannatyne health-club chain, while the business's formal branding has used names such as Bannatyne Fitness and Bannatyne Health Club. The key identifying fact is the direct connection between his surname and the company.