Thank you @ericsbrother and @silverfox1961 for your help and advice.
This morning I went to the car park in question and into Farm Foods, one of 3 shops the carpark services. I asked for the manager and showed him my parking charge/invoice/penalty/notice/fine letter and asked what could be done as I was a frequent shopper there. He said it was out of his hands and I may need to write directly to PE but he would first get my details and give them to Farm Foods customer service to see if head office could help.
10 minutes later my mobile rang and it was head office. (Recording call as advised be this site) A very nice lady asked me a few questions like did I have a receipt from the day in question, the day when I didn't actually use the car park. I said no, but then added that I do frequent their shop sometimes 2 or 3 times in a day to get supplies for my sons school (it's a special needs school so I wasn't lying about helping out the school and my sons cooking classes, just not so much in FF..)
She said she would email PE and give them my details and explain that I was a valued customer (I do spend £40 a week there so thats potentially a 2 grand loss a year if they annoy me) I didn't want PE knowing my name but the woman did seem to know what she was talking about (regular occurrence?)
Anyway, to cut a short story long I got a phone call back a few hours later from Farm Foods (recorded the call as advised), it was the softly spoken woman from earlier, she confirmed the ticket has been cancelled and any future tickets would be too. Does that mean its like the corner of the Monopoly board, FREE PARKING? Hopefully if customer service see there is a too common issue they will go to a different method of monitoring the car park..
So, a win for the consumer, although I was kind of hoping to go all the way with it to show my video of the sign being covered by the advertising board but never mind.
Again, thanks for this site and it's helpers, and thanks to FF softly spoken lady, you rock! Well, waltz..
ParkingEye Hidden.pdf