Goran Raven forked out for number plate and facial recognition cameras after losing £30,000 in four years from people driving off without paying for fuel.
Some motorists covered plates with bin bags, cardboard and rags, while others removed them altogether in an effort to avoid ANPR cameras at Fistral beach in Newquay, Cornwall.
We found at least two products that market themselves as so-called 'stealth plates defender' that illegally make licence numbers undetectable to ANPR cameras.