The Gilda Brook roundabout is a bit annoying (like most in UK) and is up to the driver or being biggest bully takes the lane thing. I have seen everything here in past 4 years. People taking first exit from lane 2 (legit) and taking the 4th exit from lane 2 too. I have used lane 2 in my initial months on this to take the 3rd exit, defying my logic and assuming this is the way it is here, but was cut out by huge lorries a few times. Hence, moved to the third lane till date.
Illustrative explanation below and please if someone can educate me if I am wrong. As usual today, I am waiting at the first set of lights on the roundabout in the 3rd lane, there is a big lorry with a trailer on my left (2nd lane). Lights go Green and I let the Lorry move and take whatever lane they want and allow space. Cue in Mr. White Van driver behind the lorry who tries to get very close and block me from taking the middle lane ahead as we turn right. At this point, I am fully ahead and to his right and showing all intentions that I am going to move in the middle safely. Boy gets annoyed and bellows a huge beep and arms in the air. With all this happening lorry moves about two car's length ahead while I am trying not to get rear ended. Van driver cuts to the right and wants to barge in this now newly formed gap ahead of me. I accelerate quickly while he is behind to not let that happen (oohh naughty me sinner). So he accelerates and overtakes both myself and the lorry and cuts in sharply ahead of the Lorry causing him to brake.
At the 3rd Exit when the lights are still Red, I am in the exit lane and he is ahead on the right with the same lorry in front of me. I see his passenger window come down, lights go Green and I wait for 2 seconds to see if he moves. He doesn't and I go on my way only to beeped again by him and probably gesticulating. I didn't pay attention at all and ignored like I do with most stupid encounters on the road.
Images below for illustration and I hate roundabouts in UK.
I am the Blue line and Mr. Van is the Red. This is the start of the whole encounter.
Pardon the Orange for Mr. Van here.
My POV below. On the left is the first exit.
Sign on the roundabout for correct lanes.