they havent got a case about you if the car and reg were wrong. its shows that they were looking at different car at the time. therefore write them a letter claiming that you dont know who's that car is. you've never owned or driven it in yourlife. tell them to check police, insurance and dvla records, which will confirm this.
youve got out of this without even needing a solicitor. send in the letter then the cps will look at the evidence and decide they dont have a case against you and drop it.
i got done buy one of those timing things years ago. i argued blue in the face i wasnt speeding and declined to sign the forms at the road side. i stated in my road side statement it was all bollocks basically. the coppers side hung on the fact he said 'he had to do 120 to catch up with me and i was clocked @ 86.54 in a 50zone. ' my arguement 'was he could have done mach 1 to catch up with me but it didnt mean i was speeding, just that he wanted to catch up with me fast' there was no evidence of me on film and he could have pressed the button when ever he wanted to, probably when he was slowing down from 120 to behind me, thats why he probably got 86mph. it was raining, dark and visibilty was poor. i had three witnesses in the car which stated the had not nboticed any excess speed. which you would @ 120 in a 22 year old escort lol.
also before he told me what i was pulled over for, he was asking about the car for about 5 mins and telling me how he always wanted an s1rst when was younger. then told me to get in the car and that i was pulled for speeding.
it was my word against his and they decided not to go ahead with it. always always argue if think there is a chink in the case. you have a case there