Penfold i'm sure that you will agree the the roundabout at Junction 10 is a nightmare! I get cut up on that all the time by drivers who do not have a clue what lane to be in even though it is written in 3 foot big letters on the floor!! They then proceed to wave their fist at me as if I am in the wrong when I am in the right lane!!
Another grip I have is tits who get in the right hand land at a roundabout when you are in the left hand lane and they go straight over and cut you up! Right hand lane is to go right, left hand lane is to go left or straight over unless otherwise stated. Again they give me abuse for almost hitting them as they think its my fault. I do wind down the window and point out politely how a roundabout works.