It seems pretty clear to me that cyclists are covered by Rule 139 for filtering down the left of slower traffic - it says nothing about the slow moving queue needing to be in a separate lane. That doesn't mean that it is safe, but it does mean you have the right to be there. 139: Overtake only when it is safe to do so. You should stay in your lane if traffic is moving slowly in queues. If the queue on your right is moving more slowly than you are, you may pass on the left.
As for the guy turning left without checking... naughty naughty Rule 158. 158: Use your mirrors and give a left-turn signal well before you turn left. Do not overtake just before you turn left and watch out for traffic coming up on your left before you make the turn, especially if driving a large vehicle. Cyclists and motorcyclists in particular may be hidden from your view.
It seems pretty clear to me that cyclists are covered by Rule 139 for filtering down the left of slower traffic - it says nothing about the slow moving queue needing to be in a separate lane. That doesn't mean that it is safe, but it does mean you have the right to be there.
139: Overtake only when it is safe to do so. You should stay in your lane if traffic is moving slowly in queues. If the queue on your right is moving more slowly than you are, you may pass on the left.
As for the guy turning left without checking... naughty naughty Rule 158.
158: Use your mirrors and give a left-turn signal well before you turn left. Do not overtake just before you turn left and watch out for traffic coming up on your left before you make the turn, especially if driving a large vehicle. Cyclists and motorcyclists in particular may be hidden from your view.