It is unlikely that PE will uphold an appeal but you'd have a better chance with POPLA. I would suggest you send the following appeal in the name of the company without identifying the driver. The reason is that there's a technical flaw in the NtK as they have not fully complied with the requirements of PoFA 9(2)(e)(i) as there is no invitation (nor any synonym of the word) for the keeper to pay the charge.
This is an appeal on behalf of [Your Company Name] regarding Parking Charge Notice [PCN Reference Number] issued to vehicle [Vehicle Registration Number] on [Date of Incident].
Upon reviewing the Notice to Keeper (NtK), we have identified that it does not comply with the requirements set out in the Protection of Freedoms Act 2012 (PoFA), Schedule 4. Specifically, the NtK fails to include the mandatory invitation to the keeper to pay the unpaid parking charge, as required by PoFA 9(2)(e)(i).
Due to this omission, the Notice to Keeper is not compliant with PoFA, and as such, [Your Company Name], as the registered keeper of the vehicle, is not liable for the alleged parking charge. Furthermore, we are not obliged to identify the driver at the time of the incident.
Based on the above points, we request that you cancel the Parking Charge Notice immediately. If you do not cancel the charge, please provide a POPLA code so that we may refer this matter to the independent appeals service.
We look forward to your prompt confirmation that this Parking Charge Notice has been cancelled.