Dragons’ Den investor feels ‘regret’ after reject’s product makes £5m

Mr Caan hinted that DiscreteHeat could be the one that got away, as he concluded: “For me, today, this is probably one where there is a sense of regret.”

After being knocked back by the Dragons in 2008, Mr Wadsworth steadily built a business from scratch, manufacturing an innovative skirting board that doubles as a radiator.

Now selling in more than 20 countries, the ThermaSkirt is installed all over the world.

In 2015, the company secured its biggest contract to date – worth £5million – with a national care home builder and, in turn, the NHS.