Unfortunately the plod are next to useless in cases with cyclists, it seems. I got taken clean out by a car in Feb 2013, it was witnessed by an off-duty copper and was filmed on CCTV. By the time the police go to view the footage again it had been wiped, and the police wrote to me about a month later and said they couldn't take any action because there were no witnesses! I wrote back and told them to find the guy who made the call to them and the ambulance, because he was a copper and my witness. Oh, we can't trace him, they said. I said here's his f*****g number, track him down. Oh, they said...
In the end I had to get some ambulance chasers on to it, because the driver claimed I rode off the pavement in front of him, the lying twat. So far my solicitor's bill is over £11,000 and I have a claim in for £7,000, no thanks to the police.
In your case Ian, look up for a local bike-friendly solicitor, you can usually find them in bike mags (cycling weekly used to be good for that) or online. Give them all the facts and see what they can do for you, that's what I had to do. Good luck, and make sure you press charges.