It's in everyone's interests that cycling in London be encouraged. If you make people take a test, apply for a licence and pay insurance, the number of people cycling will plummet. You're likely to see an increase in cars, pollution, congestion, injuries, health problems, etc. what do you get in return? It's easier to trace the few hundred cyclists involved in collisions with pedestrians each year (not that there are that many 'hit and run' cycle accidents). Or is it that its easier to fine cyclist for jumping lights etc? I suspect that what's really behind the vitriol that some direct towards cyclists is the sense that they're 'getting away with it'. Those motorists who are the most venomous are probably the same people who (if they could) would break the rules themselves. You are latent Lycra louts!