Mr Regler's wristbands have now been an integral part of more than 60 Coldplay shows, along with balloons, confetti, lasers and of course the music.

It is a huge leap forward for the firm which still employs only four people but is looking to expand.

The firm's success goes back to the summer of 2005.

It had been making electronic technology for children's toys, but had to file for bankruptcy after another firm failed to pay for a year's work.