Blood on the streets

Agree with the 20mph thing, it's appalling how many drivers are so used to 30mph being the norm that they don't acknowledge lower limits.

Not sure how many of London's cycling fatalities are the result of speeding though, I'd guess about zero.

Well maybe, but as I said it certainly creates the impression that it's OK (or even right) to break the rules depending on the norms that happen to be accepted in the driver 'community'. The same seems to be true of RLJing (which drivers do much more than cyclists) if the red light has been 'only' on for less than five seconds. Indeed, I often have the temptation to RLJ myself (which I never do--irrespective of whether I'm driving or riding) simply because I fear that the car behind me expects me to RLJ and is therefore going to crash on me if I stop.