Have you lodged a complaint? If the situation I'd as you described there are several offences for which the driver could be prosecuted.
You have the right to have the decision reviewed by an Inspector unconnected with the case. If its a CPS decision, which I doubt, you have the right of appeal to them too.
Going from the account you've presented, the decision is at odds with points 3, 5 and 6 of their crime and policing plan for 2017.
I doubt the press would care, and if they did it changes nothing.