The road layout does appear to be analogous to the situation where an outside lane merges with the inside one. Only one lane in this case, but that lane does effectively dog-leg left as a result of the island.
The cyclist is (quite correctly in my view) holding a line parallel with the kerb, but it's true to say that doing so carries him further into the
effective traffic lane. In that situation, you have to expect drivers to do stupid things, and taking the primary position early is ineffective because there's too much space on approach to the island for a cyclist to successfully herd the traffic behind him...
So.... I agree that the collision was entirely the driver's fault, and he should have been charged.
But, I also agree with SP, insofar as the manouvre was completely predictable and the cyclist could easily have avoided trouble by being prepared for it. And yes, a Lifesaver would be entirely appropriate there. You don't need to do them constantly, but any bottleneck justifies it.
For instance, I often cycle eastwards
here, and where the bus lane ends, traffic
will pull in on you. I always perform a Lifesaver here, and am ready to take evasive action if necessary.