We can chuck individual rules back and forth at each other, but the HC is not always black and white. Often, you need to consider several rules and, if you do so, then either party has an opportunity to avoid an accident, even if it would have been held to have been principally the fault of the other.
I did say that:
drossall wrote:Cyclists arriving after the lights go green would be unwise to dash up the side of left-turning vehicles, even though those vehicles should cede priority before crossing the cyclists' lane, just as someone approaching a junction in the left lane of a dual carriageway at 70mph would be especially unwise to charge through if a vehicle in the right lane were showing brake lights and a left indicator. Being in the right and avoiding crashes are not always the same thing!
However (for the motorist in our situation):
drossall wrote:It's pretty much the same, in terms of road markings, as turning left when starting in the right-hand lane of a dual carriageway. Say you suddenly decided to change route and turn left, because the road ahead was jammed - before entering the left lane, you'd make jolly sure that it was clear and that nothing was coming up behind.
I'm actually surprised that I can't find more forceful statements in the HC about not changing lanes when the other is occupied. It's such an obvious no-no.
Rule 167 is, I believe, mainly aimed at single lanes and overtaking to the right, which is not the situation here. As I said, there are accidents that either party can avoid. In my assessment, in a single lane, if a car overtook a bike, or vice versa (why would it be different?), at a junction, and the vehicle overtaken suddenly turned right, 167 would only be one of the relevant rules, and both parties might be held at fault. One would be wrong for not looking or signalling adequately, and the other for overtaking inappropriately.
With a single lane in each direction, I said that:
drossall wrote:Normally, cyclists occupy the same traffic lane as motor vehicles, and so should not move left of a left-turning vehicle. Again, this is no different from cars, though they normally are too wide to try - but imagine that you were slow in turning left at a junction and a driver tried to nip past on your left to get ahead - it must have happened somewhere! In that case, the driver to your left would be in the wrong. Generally speaking, then, there's no real difference between cars and bikes - both are vehicles, and the rules of conduct for each, and towards each, are the same.
Incidentally, no-one practises the obvious meaning of rule 167, as far as I can see. Do not overtake at or near side turnings, whether they are to the left or the right, even if no vehicle appears to be turning.