In case you missed it, the BBC's Inside Out East programme on bad professional drivers, screened last night, is available on iPlayer for the next month.
The programme showcases how cyclists and drivers are using action cameras to catch professional drivers who drive badly.
Presenter David Whiteley meets Dave Sherry, a cyclist and bus driver from Harlow, who posts footage on YouTube of lorry, van and bus drivers whom he believes are driving irresponsibly.
Sherry's clips frequently come to the attention of drivers' employers who are rarely happy to have their name associated with poor driving.
In 2013, Sherry's footage of a bus driver using a mobile phone led to the driver being sacked.
Sherry also sends the worst examples to the police.
Asked by the presenter if what he does isn't vigilantism, Sherry points out that he doesn't take the law into his own hands. "I just report it, but I'm very effective in the way I report it," he says.
How effective? He claims his footage has resulted in around 50 convictions, which probably makes him the most effective citizen traffic cop in the UK.
John has been writing about bikes and cycling for over 30 years since discovering that people were mug enough to pay him for it rather than expecting him to do an honest day's work.
He was heavily involved in the mountain bike boom of the late 1980s as a racer, team manager and race promoter, and that led to writing for Mountain Biking UK magazine shortly after its inception. He got the gig by phoning up the editor and telling him the magazine was rubbish and he could do better. Rather than telling him to get lost, MBUK editor Tym Manley called John’s bluff and the rest is history.
Since then he has worked on MTB Pro magazine and was editor of Maximum Mountain Bike and Australian Mountain Bike magazines, before switching to the web in 2000 to work for CyclingNews.com. Along with road.cc founder Tony Farrelly, John was on the launch team for BikeRadar.com and subsequently became editor in chief of Future Publishing’s group of cycling magazines and websites, including Cycling Plus, MBUK, What Mountain Bike and Procycling.
John has also written for Cyclist magazine, edited the BikeMagic website and was founding editor of TotalWomensCycling.com before handing over to someone far more representative of the site's main audience.
He joined road.cc in 2013. He lives in Cambridge where the lack of hills is more than made up for by the headwinds.