Unfortunately this thread is rather devoid of facts. What we have is one sided hearsay information describing a chain of events. If we look at what little facts we have, perhaps things may become clearer. (If I am wrong on any of these facts then I'm happy to revise them btw)
1. There was a traffic accident involving a car and a motorcycle.
2. The accident was serious enough to require police attendance.
3. Both parties were questioned by the police on scene.
4. The police on scene examined the evidence at the scene of the accident.
5. Based on the evidence, the police at the scene deemed that the driver of the car should be reported for a traffic offence. (I'm not sure if the offence has been made clear but the assumption is that he has been given an NIP for driving with undue care and attention).
6. The motorcyclist was not reported for an offence.
7. The report was submitted to the CPS, who further examined the evidence put to them and concluded that there were sufficiant grounds to warrant a procecution.
8. A plea was then submitted by post by the defendant which would have then been examined by a senior prosecutor who then concluded that the offence was too serious to be able to accept a plea in writing and the defendant was subsequently served with a summons to attend court.
9. A court hearing has now been scheduled.
Now, those that have been arguing that the bike rider was at fault or that he was in breach of the highway code are doing so in spite of the fact that they are doing so direct contradiction to the views of the traffic officers on scene, the specialist motoring lawyer at the CPS who brought about the case and the senior prosecutor of the court who deemed it necessary for the defendant to attend in person - all of whom were privvy to the facts of the case, unlike ourselves.