Which original Dragon's Den investor was known for the catchphrase “I'm out”?

Duncan Bannatyne was the original Dragon's Den investor widely associated with the phrase “I'm out”.

The expression became a concise way for an investor to end consideration of a pitch. Once a dragon said it, that particular investor was no longer participating in negotiations, although other dragons could still continue questioning the entrepreneur or make an offer.

Bannatyne joined the original investor panel and became one of the programme's most recognisable figures. He built his business career in areas including care homes, health clubs and hotels, giving him a reputation as a commercially experienced investor.

The phrase is sometimes attributed to another dragon because several investors used it during negotiations. Bannatyne is the investor most strongly identified with the catchphrase in popular descriptions of the British show.