If you are a keen cyclist on the London streets and on social media, you already have seen a quiet revolution take hold. When I moved to East Dulwich fifteen years ago as a young mother, I was the odd one out. I rode a tangerine coloured triple tandem (as well as the yellow bike above!) for the school run, rain or shine. At that time, there were few cyclists on the road in leafy Dulwich. I remember being interviewed on the radio about cycling with my children to school about