Just ridicule them about their rubbish PCN (without begin too specific) and the the Unicorn Food Tax they've added.

you wont be bargaining with the police where did you get that idea from? it wasnt a bobby with a handheld, it was a gantry camera i suspect. all thats done in court to the judge at the hearing. dx  

Well, it's good that you have five days before you're supposed to go there, there is time enough to sort things out.  See if Booking.com rear their head tomorrow.

Any update?

It is an interesting Final Notice. Firstly because there is usually a reminder Notice before the final Notice. Secondly because it contains some of the wording that should be in the original PCN [aka Notice to keeper]. It could be that the necessary wording in the NTK is missing so they put it in the Reminder Notice to cover their error. If they have it hasn't worked. But the only wat we will know if you post up the back page of the Notice to keeper along with the other details asked for on Post 8 .  If they have got it wrong it means that they are unable to transfer the liability to pay the PCN from the driver to the keeper . I take it that you are the keeper and not the hirer? And do you know how long you are supposed to stay in that car park? In the past I have found Sainsbury's pretty good at cancelling PCNs for their customers. Take both PCNs in to the store and point out if you are a regular customer and that the driver spent a lot of money in their store and see if they could please do something with the ticket for you. if the manager can't help, then come back and we will give you their Head office and write to them. It is the easiest and quickest way to get the ticket cancelled. No point in appealing since that would mean they lose the chance to make any money out of you which is their whole reason for running the car park. If you cannot get Sainsbury to cancel then we rely on ECP getting things wrong so that you don't have to pay  on a technicality or technicalities. For example if the PCN does not comply with the Act and the keeper is not then liable it makes it difficult for ECP to win should it go to court as so many people are legally able to drive your car and Courts do not accept that the driver and the keeper are the same person. Which is why we do need to see the questionnaire filled in and the rest of the NTK. Also it would be helpful to get photos of the signs in the car park. Ones that can be read by us, and the sign at the entrance as well as the inside ones especially those that are worded differently. Poor signage is another defence that works well and you will  need a good defence should they decide to go to Court.