This is from The Times (Note for those who do not know, an MOT is the equivalent test to a WOF, although it includes emissions testing)
"A former Royal Navy submariner has used his military knowledge to develop a green engine technology that can halve car emissions as stricter MoT tests come into force next month.
Brian Sheard, who served on nuclear hunter-killer craft, retired from the service after 23 years and took inspiration from the way submarines make their own air during months-long missions.
His technology, contained in a black box attached to the car engine, creates small amounts of hydrogen to inject into the fuel/air mix and create a cleaner and more complete burn of the fuel.
Tests have shown that this can cut visible soot particulates and give fuel consumption savings of between 5 and 7 per cent.
Mr Sheard’s company, CGON, is collaborating with Morgan Motor Company with the aim of fitting the devices to the British sportscar company’s new cars and retro-fitting them to existing ones. Morgan said it had found a significant difference in emissions levels and fuel efficiency in tests.
An estimated 100,000 cars a month fail the MoT on emissions and from May 20 there will be tougher regulations, including stricter limits for emissions from diesel cars. A vehicle will fail if the tester can see smoke of any colour coming from the exhaust."