The most successful Dragons’ Den contestants ever, from Levi Roots to Wonderbly

The Dragons have invested in several lucrative businesses (Picture: BBC/Andrew Farrington)Ever since Dragons’ Den was launched by the BBC in 2005, countless entrepreneurs have participated in the programme in the hope of bagging at least one investor for their companies.The current line-up of Dragons on the show include Deborah Meaden, Peter Jones, Sara Davies, Touker Suleyman and Tej Lalvani, the last of whom is set to be replaced by 28-year-old Steven Bartlett for the 19th series.While s