It's a merge in turn. Merge in turns work well if that's what people do instead of blocking each other's way. This van driver had a choice of remaining on the roundabout blocking it up or moving into the empty lane there.
A merge in turn works like a funnel to get traffic through a junction from different directions and down a road efficiently in the same way it's been proven putting a bollard in front of a doorway so people approach it from the sides and merge into one line gets people through faster than them approaching it in one line straight on.
Needs banning off the roads