Thanks for the brilliant responses guys. I have sent off an email to the DVLA requesting that info and will update you when I get a response from them. I have only just realised that the PNC notices where issued on a car I no longer own, am I correct in thinking that wont change anything? Clarification: I did own that car at the time the PNC notices where allegedly issued.

Hello good people of the CAG. I have just arrived home from Uni and found 7 letters from a company called Debt Recovery Plus Ltd, each letter demanding £150 for unpaid parking charges. These charges span a period between 16/10/15 - 06/11/15. I called the company to dispute the charges as the ticket machine has been out of order (It is still not working!) and the lady at the car park who checks to see if people have payed and displayed told me to place a note in my windscreen stating that the machine is out of order and I'll not get a fine. DRP told me on the phone that I cannot appeal as I'm am out of the appeal period. I didn't receive any letters from the company that issued the original charges (LDK Security Group Ltd) so this is the first I know about them. Was the guy from DRP correct in informing me that I cannot appeal? Any advice would be very much appreciated. Thanks, Paul. Update: I have just visited LDK Security group website in search for proof of parking violation and apparently there should have been a note stuck to my car with a reference number on it. This has not been the case.