Peter Jones was a Dragon on every series of the original British Dragon's Den run.
Jones is an English entrepreneur and investor who joined the programme at its beginning. He became one of its most recognisable panel members, known for considering businesses across technology, retail, food and consumer products.
The wording refers to the original British run and to the regular Dragons listed for the programme, rather than to guest appearances or international versions. Panel membership has changed over time, so other prominent investors were associated with particular stretches of the show rather than its complete run.
Duncan Bannatyne and Theo Paphitis were also part of the original panel, which can make this fact easy to confuse. James Caan joined later. Peter Jones's continuous presence is therefore the distinguishing detail: he links the programme's earliest British series with its later panel line-ups.