BBC News - Helmet cameras capture bad driving
This doesn't have to be the preserve of cyclist. Drivers and bikers could use these too if they thought they were at risk.
With more cyclists than ever on Britain's roads, an increasing number are coming into conflict with other road users.
Their latest weapon is wearing a miniature camera attached to helmets or handlebars, to capture bad driving.
For most cyclists, "naming and shaming" drivers is as far as it goes. But Ben decided to take things further after one van driver overtook him too close and then jumped out to confront him, shouting abuse.
"I think he wanted to teach me a lesson. It wasn't very nice, but he didn't notice the camera," he said.
Mr Porter, 37, took the footage to his local police station and the van driver was eventually prosecuted and found guilty of a public order offence and driving without due care and attention. He was fined £300, with costs of £150 and given five points on his licence.
This doesn't have to be the preserve of cyclist. Drivers and bikers could use these too if they thought they were at risk.