Which British TV channel originally broadcast Dragon's Den?

The British TV show Dragon's Den originally broadcast on BBC Two.

BBC Two launched the programme in January 2005 as a business-focused reality format. Each episode places entrepreneurs in front of investors who question their sales, costs, ownership and plans for growth. The channel’s factual and documentary tradition made it a natural home for a programme centred on commercial decision-making.

Although the show later became one of the BBC’s most recognisable entertainment brands, its identity remained closely linked with BBC Two. This is different from some international adaptations, which have aired on commercial networks or under different titles.

The channel is an important part of the answer because the Dragon’s Den format exists in many countries. A question about the British programme specifically refers to the BBC production, rather than a foreign version with a separate broadcaster and investor panel.