Okay, after watching the BBC 'War on the Roads' doc you might be thinking about getting a helmet cam as I am. I've cycled for thousands of miles without a problem and then one day find myself in exactly the sorts of situation shown in the documentary. Now this might not be every day, but I sure have found myself being cut up, having to knock on peoples doors who are straying into the bike lane etc.
So maybe a helmet cam is a good ideal, but sticking a gopro on top of my head is not my idea of aerodynamic, discrete or cool. So what are you recommendations for a small helmet cam that is not too obvious or heavy and could even fit up one of the vents?