Lorries in London, it'd be alright if cyclists just saw their point of view.

hippy I've been hit undertaking a line of right-turning cars when one silly bint decided she'd had enough of waiting and suddenly turned left into me without looking or indicating. In this situation I would always be undertaking (even with this risk) because there's no room on the right and cars are turning right anyway.

That's one of my biggest fears, actually, as there are quite a few junctions in London where there's a queue to turn right and a clear lane to go forward - you want to go at your normal speed, but you're scared someone will pull sharply in front of you...

The over/undertaking thing is difficult. I was overtaking stationary traffic on Clerkenwell on the right, and a guy almost hit me doing a u-turn without indicating. there was a turning to the left and no turning to the right, so i was going at a reasonable clip, thinking that i was okay. fortunately it was dry, or i'd have gone over the bonnet.

a policeman saw the whole thing, and pulled me over to the kerb and gave me a lecture about being careful!

then in another instance, i overtook some stationary traffic and the lights and went to filter in as the lights turned green. a guy in a merc took umbrage and decided to speed up and slow down to stop me filtering into the lane (and over to the left, out of his way), so i was dodging him and oncoming scooters for half a mile. i yelled at him at the traffic lights and he followed me another mile to my office so that he could threaten to break my legs. nice!

despite that, on the right is generally the best place to overtake slow/stationary traffic.