This video was doing the rounds on twitter last week and has now popped up on a couple of news media sites (with the reg number obliterated). Nothing excuses the behaviour of either the driver or his passenger but, from my experience as a commuter in London, this initial situation is a common one and the cyclist created the initial conflict by rolling back to speak to the driver in the first place. Had he not done so, the Audi would still have raced off in any case.
What usually seems to happen when cars encroach into ASLs like that is that all of the bikes that would have been in the ASL simply position themselves in front in any case, so the lesson is soon learned (and, as you'll see , the Audi stopped in the right place at the next junction).
