"i have cycled for 6 years in london and most of the time i end up in shit because im cycling like a twat. iv been hit once which wasnt my fault but i was scooting down the outside of traffic at speed so the inevitable happened. if you are sensible, have good breaks, and aggressive (in riding) when its needed cycling is the ONLY and BEST way to get about the city! there is absolutely no excuse to not wear a helmet, it is the small knocks that cause serious damage.
enjoy the fresh air and being able to look in on slow angry drivers at the mercy of roadworks and traffic lights!! :)"