So err, if i've been driving around with PVR's plates since June is this where we all come clean and admit it?
Regarding the original ticket - don't pay it, they cant enforce it. just drive off, ignore the ticket and carry on with a happy life. If they do decide to pursue court after the 4th letter they send you demanding money, you can just argue for actual cost - and send them a cheque for the value of the ticket you didn't buy. Plenty of websites dedicated to this - you owe them nothing.
The caveat, if it's a council car park, you must pay.