I think that Mr Alliston's actions fell well below the standard that most of us here would advocate and practise. That, including his belligerent attitude is, I suggest, at the root of some of the opprobrium seen in this thread. There is though a gulf between best practice and illegality, and I remain to be convinced, that - Construction and Use Regulations aside - his actions were illegal. The prosecution's case seemed to hinge on expert evidence that had a front brake been fitted, then he would've avoided the collision, and that evidence seems to be in considerable doubt. Given that - at best - it was marginal as to whether he could've avoided the collision by using a front brake, then it seems to me that swerving to avoid her was a reasonable course of action. Clearly, he should've been travelling more slowly, but again that brings us back to the gap between good practice and illegality. I can't escape the feeling that he has been held to a higher standard than would be expected of a motorist in a similar situation.
Finally, an anecdote: cycling to work this morning, a pedestrian stepped off the kerb in front of me. I was travelling slowly, and have disc brakes front and rear. My instinctive reaction was to swerve round her. Food for thought?