Sarah Willingham joined the British Dragons' Den panel in 2015.
Willingham became a Dragon during the programme's thirteenth series. She brought experience from consumer businesses, hospitality and retail, including her involvement with the London-based restaurant chain Bombay Bicycle Club and other entrepreneurial ventures.
Her time on the panel was comparatively brief: she appeared as a Dragon in 2015 and did not remain a permanent investor across later series. This makes her easy to confuse with investors who joined around the same period and stayed longer.
The year 2015 refers to her television appointment, not the year she began her business career. Dragons' Den has had several changes to its panel over time, so identifying a Dragon's joining year requires separating the investor's commercial history from the series in which they first appeared.