It's Scotland! You can safely ignore it. ECP have no idea who the driver is unless the Keeper (recipient of the Notice to Keeper [NtK]) tells them. If they don't know who the driver is, how do you think they'll be able to do anything?
For now, there is no Keeper liability in Scotland. There is no legal obligation on the Keeper to identify the driver to an unregulated private parking company. They are not allowed to infer or assume that the Keeper must also be the driver.
Do not try and appeal it. Just ignore it and also ignore all subsequent reminders and debt collector letters. Debt collectors are powerless and can safely be ignored. Use any letters from them as kindling or to line the bottom of a cat litter tray. We don't need to know about any that you receive. Never, ever, ever try and contact a useless debt collector.
Even if there was keeper liability in Scotland, it is doubtful that they would ever try and recover the charge in the simple procedure in the Scottish courts because they cannot recover any costs for a claim under £300. It simply is not worth their while.
They work on the principle that most of their victims a re low-hanging fruit on the gullible tree and have no idea of the law, their rights or the process. Sadly, most recipients of these PCNs, simply pay up, usually because of the "mugs discount".
Anyone receiving advice on here doesn't pay a penny to ECP, even if they are in England or Wales. South of the border, they would eventually issue a county court claim but as long as it is defended, they will eventually discontinue.
So, get on with your life and ignore all correspondence about this, especially the debt collector letters and they will eventually move on to even lower-hanging fruit.