It won't help Accy, but my FiL recently beat one of these.
He inadvertently parked my MiL's motability car in a bay that he shouldn't, and MiL got a ticket through the post.
MiL has had several strokes, is wheelchair bound, and cannot speak, so FiL rang the parking people to pay the bill but they wouldn't talk to him for "data protection" reasons as he wasn't the registered keeper. They would need MiL's permission before they could talk to him. That she is unabke to speak cut no ice with the brain donors at the parking taliban.
Fine, so he slammed the phone down, and ignored all the subsequent threatening letters and let the matter run its course to court.
The day of court came around, and when MiL was called she was duly wheeled in by FiL. When it became apparent that MiL can only talk in whispers and groans the parking firms solicitor asked FiL what she was saying, to which FiL responded, "oh no, you can't speak to me for data protection reasons".
He then explained the whole sorry saga about how he had tried to pay but the taliban wouldn't speak to him because of data protection, upon which the district judge promptly threw the case out and gave a sheepish solicitor a serious bollarking.