I had a similar difference of opinions with a private parking firm. I probably made my first mistake by emailing them, rather than ignoring. Their response was:
Within the correspondence it suggests that you were not the driver at the time of the contravention.
As such, because we are members of the British Parking Association (BPA) we are required to invite you to declare that you either were the driver of the vehicle at the time the charge was issued or to disclose the identity of the driver at that time.
We feel obligated to mention that, under the Pre-Action Protocol of the Civil Procedural Rules, court action must only be viewed as a last resort. We are making all reasonable attempts to avoid this outcome.
However, it is worth noting that, if this matter does proceed to court, we will request that a Norwich Pharmacal Order [Norwich Pharmacal Co. v Customs and Excise Commissioners [1974]] be issued by the Court so that the correct driver details would have to be provided.
Many forums /sites advise people to ignore parking charges; with some advising people to send standard letters to deny liability for the charge notice.
It is not advisable to believe what you read on the forums as we do take people to court.
This was proven in Oldham County Court in November 2008 where an operator won a case where the keeper stated that they were not the driver and could not remember who was driving. The judge decided that on the balance of probability he was the driver and ruled against him.
Please visit http://www.oldham-chronicle.co.uk/news-features/8/news-headlines/15246/parking-penalty-just-judge-rules for a summary of the case.
i.e. lots of legal-sounding bullocks which they hope will scare you into paying up. Sadly I think I’m in for a lot more of this, by showing willing by responding to their first letter 👿