Dragons' Den investor Duncan Bannatyne established the Bannatyne Group as his main leisure and health-club group.
The Bannatyne Group is associated with health clubs, spas and hotels in the United Kingdom. Duncan Bannatyne built the business empire that bears his name and later became one of the original investors on the British version of Dragons' Den.
His business career began before his television role and included ventures in several sectors. The leisure group became one of the clearest public markers of his commercial identity, which is why “Bannatyne Group” is a more precise answer than a generic term such as “fitness clubs”.
David Lloyd Leisure, Nuffield Health and Virgin Active are separate organisations. They may appear in discussions of British gyms or health clubs, but none is the group named after Bannatyne. The question asks for the group he established, not a company in which a television contestant sought investment.