Sorry for the late reply David. Yes I think you're right about the number of cars. I wasn't 100% sure about 2003, with the big shunts that you mentioned. I'll bow to your superior knowledge on the subject.
Most of my list has been compiled from forum posts and photos on the internet. A lot of it is 2+2=5 probably, but I thought I'd try!
Feel free to post your list if you like.
I've seen the post you quoted from the MG forum and agree with you. They must have purchased the ex-Turkington car from 2006. For some reason I thought that was the car Trevor Turkington had, as there was reference to it being Colin's car in 2005, when Rob Collard was driving it. David from Kartworld seems to think Jason has an ex-Atomic Kitten car, as does their website?