Off topic slightly, but responding to a comment of Perryman's: "one of Boris' playthings and his aim is to keep the traffic flowing as priority No 1"

I really believe, and have done for a long while, that one of the best ways for him to do this would be to run a huge campaign with posters and radio adverts etc etc telling drivers to simply let other motorists in or out whenever possible, especially when a car needs to turn right into a road (which causes traffic to build up behind that car). If someone let them through, it would do them no harm and would keep traffic moving. It's not only good for traffic flow but would be so good for drivers state of mind (road rage). The trouble is the majority of drivers in London are just too ignorant in more ways than one. If they were prompted/asked to do it, it may just work.

I pride myself on how courteous I am on the roads, not so proud of my road rage at times however