Peter Jones is the investor who has appeared as a Dragon since the British programme began.
Jones joined the original investor panel when Dragons' Den launched in 2005 and became its longest-serving Dragon. His business interests have included technology, media, retail, and consumer products, giving him a broad range of experience when assessing pitches.
His tall stature and direct questioning helped make him one of the most recognisable figures in the series. He is also associated with the Peter Jones Foundation, which supports education and enterprise initiatives.
Other prominent Dragons, including Deborah Meaden, Duncan Bannatyne, and Theo Paphitis, have had substantial runs on the programme, but they did not remain on the panel continuously from the original launch. That distinction makes Jones the specific answer.