Given all the (positive) fuss about Skyride last month (which I bang on about in the forthcoming December issue of Cycling Plus magazine, including 13 jokes and some obscure references to A-level maths) I was surprised that more people didn't point out that you can cycle traffic-free in central London every week.
Each Sunday, the Mall and Constitution Hill, running off from Buckingham Palace, are closed to motor vehicles, meaning you can swan up and down on a bike unassailed by traffic.
Make your own Skyride! Invite friends to come along and pretend to be marshals and tell you to stop doing whatever you're doing and ignore them! Have a picnic in St James's Park without 65,000 people all queueing for the toilet in front of you! Etc.