Yes, Ethel is absolutely correct.
I have seen numerous threads on AB and �expert advice� given in other places that suggest if you file the �invoice� in the bottom drawer it will eventually go away. The parking enforcement company will no more go away than will the gas company if you fail to pay your gas bill. Although there are some cowboy outfits around, in the main those used by big retailers are not �chancers�. They know the law and have a team of people to rigorously support their actions.
Every case, of course, turns on its individual merits and the one cited is but one of many. I�m quite sure there are many others where the decision went against the parking company, but you will not find those details on their web site. However, in general, if there is evidence to suggest that a parking contravention has occurred, the onus shifts to the driver to come up with a reason to prove it has not. As amply demonstrated by the sample case, this is by no means easy. Furthermore, the burden of proof in a civil court is to a much lower standard (�the balance of probabilities� and not �beyond reasonable doubt�) than in a criminal court.
Finally, the effect of a CCJ on an individual is often far more profound than a minor criminal conviction, particularly if that individual wants to pursue a �normal� lifestyle, involving loans, credit cards and mortgages, etc.
The points raised by mrs_overall (particularly concerning who was driving the vehicle) are valid. They were addressed in the case cited and the ruling went against the driver. If you want to defend the case along those lines the onus will fall upon you (or your wife) to prove your point. If you can be bothered and you think you can succeed I wish you well.
However, bearing in mind that a parking contravention has been committed by somebody driving your car (which I do not believe is denied) I personally would pay up and move