There's nothing more frustrating than being held up at a roundabout by one of those idiots who doesn't pull out just because there is a bit of oncoming traffic they are required to give way to. This usually happens when there's a police car or an L-plate driver up ahead.
How do you cope in this situation? S937JHY for JGSF removals shows what to do.
You switch into the left lane, go past the right hand lane then pull out in front of them. You mustn't signal when doing this, as it would give the game away.
Now, some troublemaker will say "isn't that lane OK if you are going straight on?", for which the answer is: only if there is a straight on. This is the mini-roundabout at the junction of York Street -where the van is- Sussex Place to the left, and Arley Hill to the right. There is no straight on. What the van has managed to do is sneak past about five or six slow moving cars and pull out aggressively, so coping with the coward at the front who wasn't being aggressive enough. Fast, effective, not that illegal.