As Dragons' Den celebrates its 20th anniversary on our screens, let's take a look back at the success stories that slipped past the Dragons on the BBC show.

From the beer company Brewdog to the surprise hit of the small Tangle Teezer hairbrush. We've looked at all the products ...

But the Dragons haven't always spotted a good deal, with many of the hundreds of products featured on the show seeing success without the aid of the Dragons. From the beer company Brewdog to ...