Graham and Lorraine explained that they did not want to license their product because they didn’t want other people tampering and changing things. However, the Dragons’ argued that this may be the solution to all their problems.

Touker Suleyman said that their dreams of saving lots of lives would be achieved “a lot quicker” if they find the right company.

He added: “Then I think your dream will come through.

“You haven’t got a business, what you’ve got is a patent.

“Licence it so that for every one sold, you will get some money. I’m not your partner, I’m out.”