Real heart in mouth moment for me yesterday.
There's a horrible roundabout (the notorious Angerstein or Woolwich Road junction) near home at which 2 cyclists have been crushed by lorries in the past 11 years. I was waiting at the lights, a couple of cars behind a cement truck, when a cyclist came past on my left. He then proceeded to ride right up beside the cement lorry, which was indicating left, in the driver's blind spot. The lights changed, the lorry began its left turn, and you can guess the rest.
Fortunately, the cyclist got a foot down on to the pavement and just about managed to stay upright, but there wasn't a lot of room between his wheels and the truck's. He then tottered off and attempted to turn right by riding all the way around the edge of the roundabout.
I doubt the truck driver was even aware of his presence but, had there been worse consequences, I would have vouched for him. I hope the cyclist manages to learn some road sense before it's too late.