Was in Paris this week - despite drizzle, I saw literally hundreds of people using the City run bike scheme - good quality, distintive grey bikes with baskets on the front and lights, available to registered users who pick them up at bike stands scattered all over the city and suburbs. You pay a small charge to register (a one off), then get free minutes, and then a smallish hourly charge after you've used them up (the charge deters people from keeping the bikes at home, so keeps the available pool big). They were being used by "ordinary" people in the centre of the city. Seemed to be a success, from talking to locals - they enthused. I think Ken is keen for London.