This was filmed this afternoon in Aldershot and shows the type of behaviour I see on a regular basis from motorists.
http://www.youtube.com/watch?v=lqXlKrk8Os4&feature=youtu.beI was doing a moderate speed of around 20mph approaching a roundabout and signalling to turn left. The car behind just had to overtake even though this put me in a dangerous situation as the road narrows at the roundabout with a traffic island.
My choices:
a) slam on brakes, not knowing if the car behind this idiot has seen me (potentially dangerous to me)
b) swerve out to the idiot standing my ground but dont know if there is anything to his right like a motorcyclist (potentially dangerous to someone else)
c) stand my ground and make eye/verbal contact forcing him to back off. You can probably just make out I shouted "What are you doing?"
I chose c) and got a toot of the horn for my troubles. In retrospect I probably should have taken more of the road i.e. held position further out in the middle of the lane to dominate the road and try to prevent the temptation of the motorist to do this.
BUT! This is what a lot of motorists complain about with us 'bloomin cyclists' in the middle of the road. I hope this explains a little better why this is a necessary technique

Edit: video link now working
