The British Dragons' Den episodes filmed at Pinewood Studios are made in Iver Heath, a village in Buckinghamshire.
Pinewood Studios is a major film and television production site in England. Its location in Iver Heath provides the studio facilities used for the Dragons' Den set, where entrepreneurs present their businesses to the investor panel.
The village is near Iver and lies west of London, in the South Bucks area. That location can be confused with the places where the entrepreneurs or investors live, but the question concerns the production studio itself.
Dragons' Den is filmed on a constructed interior set rather than in a permanent real-world business office. Pinewood's wider history includes major film productions, making it one of Britain's most recognisable studio sites.