Soldato
Lorries, white vans, and Range Rovers physically position themselves to block people overtaking the queue and prevent people exiting at the correct place, something that's also extremely dangerous as people are forced to stop in lane 1 unexpectedly until someone let's them in. This merge in turn blocking should be prosecuted.
This infuriates me at merge in turns. It makes the queue unnecessarily long, backing up onto other junctions and roundabouts. Just because they don't want to use the lanes effectively they feel the need to police it themselves and enforce their own ideas of how things should work and stop you "queue jumping" even though they're in the wrong and could have done the same!
Add buses to the list too!