I had a bit more than a "paint swapper" two years ago, and the biker than rammed into my side ended up with a broken ankle when his bandit landed on him...
Like you, I ended up in court (I was there for driving without due care and attention, a prosecution I'm told is very hard to be proved innocent). I was stupid and relied on a friend's father for legal support and a few days before the court case I found out he was going to be in Korea on the day of the court case...
Desperate, I posted for help on here, and ended up calling these people
http://www.motoringlawyers.com
they said that it was a little last minute and they were all busy, but that they would call me back. A few hours later they called back (quite late by then... 8/9pm if I remember well) asked for details on the case, asked me to email a scanned copy of anything I had, including any pictures, text etc.
Went to court 2 days later, found a friendly m.a. lady waiting for me. We chatted a bit and I showed her the junction I had had my incident (on google earth) she liked the idea (and we eventually showed map on google earth as the photocopies that had been officially submitted as evidence were worthless).
A few hours later I was a free man, with a clean driving licence, no convictions and a MUCH lighter heart (and wallet)! I got charged £1,000+VAT most of which I had to pay in advance - but I did get awarded costs so I ended up paying about £100. (The court didn't award the full costs, it was about £100 short).
I would recomend them without blinking an eye - their website is horrible... but they know their job!
Michele