Looking at your rap sheet there Sussex I think a couple of you past charges may be covered under the rehabilitation of offenders act and been wiped clean.
http://www.disclosure.gov.uk/docs/pdf/ROA%20Leaflet.pdf
1996 - 18 month ban for drink driving (stupid I know)
5 years - Gone, although I think it sticks on your license for 11 years. Not sure if that can or cannot be taken into any account.
1997 - Nicked at 126mph (they sent the court summons to the wrong address, caught up with me and extended the dd ban,
Again 5 years so it should now be gone.
1993 - 3 x drugs charges (well documented on here in previous posts - lucky to get off with just probation)
Again I think that's 5 years as well so you should be completely clean and past offences can't be taken into account in court.
Get yourself a decent brief and go through the events with a fine tooth comb.
Start asking questions and check out all the facts.
Why didn't you see the woman stop?
What time did she claim to have been there?
Did you report the incident, if not what reason?
I wouldn't stress to much until you have spoken to a legal eagle. Sounds like bollocks about a strech and is a bit of a wind up.