Van.
No excuse to just pull in whilst indicating, especially towing a caravan.
Would have liked to see just how long caravan numpty had been indicating for and why he left it so late.
Team van, although the legions of people on here who've moaned in the past about people getting in lane early might disagree, as might the coach drivers who regularly cut in late outside Sussex University on match days.
Team van. First of all there was no space initially for the caravan driver, surely he could have just waited until the van had passed, or maybe even been sensible and looked at the road signs and not try to turn off right before the turn off point, which could've prevented the whole thing. That is just some idiotic driving, there was no way he was fitting his big 4x4 car (it looked like one anyway) and a caravan in that small gap that he shouldn't have been driving on anyway, once he got himself into that stupid situation he really could've and should've waited for the van to pass then waited for a gap, and his reaction made it worse, what a twit.
Second of all: caravan driver was obviously trying to skip the queue. Probably could've moved over a mile back when you usually see the first sign for an exit, but saw the traffic and went on. Ended up blocking lane 1 of the road because of his own impatience and incompetence.
Third: truck driver didn't do himself any favours by speeding up, but he wasn't in the wrong. And the lack of any aggression towards the caravan driver until he hits him might help him. Had he been moaning and swearing about him straight off it might look worse on him.
But yeah, silly old man. Quite how he thought he was in the right is beyond me, indicating doesn't give you right of way, especially when you're queue skipping and cutting across a junction at the last possible moment