Thanks to everyone who took the time to reply.

Does anyone have any legal constute on which i can argue my case as opposed to just ignoring - I understand that private property is different to public highways but what exactly makes these fines illegal?

Hi, Would be grateful of any help. Have already read the stickys about these charges. I am a medic and attended a 4 day course at Keele university. However yesterday when I returned to the car I had a CP notice on my car stating the car was parked in a permit only zone. Apparently the car park two weeks earlier had been changed to a permit holders car park and they have begun enforcing the parking using a company called the "Car Parking Partnership" There was no notice on the entrance to the car park and only 4 small signs dotted around the car park. I parked there in good faith and paid what I felt was the appropriate fee. Should I just ignore the penalty or explain this was a legitimate mistake? Many Thanks For Any Help.