The Times article states
The appeals service set up to oversee private parking companies fears that it has no authority to adjudicate on cases involving breaches of bylaws and has ordered operators not to pursue payment while the dispute is resolved. The Department for Communities and Local Government has been asked to clarify the law.
Lawyers believe that the stand-off may call into the question the legal basis for issuing the tickets in the first place, potentially rendering them invalid.
FOIR5531 is currently overdue as the DVLA figure out how to answer. This in turn refers to FOIR5322. The problem is the almost complete redaction of this document.
If it is found that these tickets are invalid then motorists will be able to reclaim any charges paid up to six years ago. They may have to sue the parking company to get this. Whether or not the motorist paid, they may also be able to claim up to £750 for breaches of the data protection act for unlawful use of personal data.
The Parking Prankster