What is the name of the British Dragon's Den spin-off in which rejected entrepreneurs revisit their businesses?

The British Dragon's Den spin-off in which rejected entrepreneurs revisit their businesses is Dragons' Den: What Happened Next?

The spin-off follows up on entrepreneurs after their appearances in the main programme. Rather than concentrating only on the pitch-room decision, it examines what happened to businesses after an investment was accepted or declined and how the companies developed later.

The title describes the programme's purpose directly: it asks what happened next after the den. This makes it different from the main series, where the central event is the entrepreneur's presentation and negotiation with the panel.

Viewers sometimes use informal descriptions such as “beyond the den” when referring to follow-up episodes, but the recognised programme title includes the phrase “What Happened Next?” and the plural possessive “Dragons'.”