Thanks all for the input, here is my draft representation:
I am writing to formally appeal against my second ULEZ charge levied against my vehicle on the 23rd June 2024. The Penalty Charge Notice reference number is XJ31678760.
On the evening of Friday 21st of June I drove down to visit my sister, niece and nephew for the first time in many years. Although I trust there was signage on the boundaries I must have overlooked these at the end of the 4 and a half hour drive, and due to my lack of knowledge of ULEZ and its boundaries, I did not realize that my vehicle was subject to any charge.
Upon receiving the PCN for the Friday 21st June entry, I educated myself on the ULEZ regulations and then paid promptly as it was ultimately my fault (Payment Reference: E112465931 - unfortunately I have since disposed of the first PCN and do not have another reference number).
I understand the importance of adhering to environmental regulations, and I assure you that this was an unintentional oversight. As this is my first offence, I kindly request leniency and the cancellation of the second ULEZ charge on this occasion.
I sincerely hope that you will consider my appeal favorably and grant a waiver for this first-time, unintentional offence.
Thank you for your understanding and consideration. I look forward to your positive response.
Yours faithfully,
Best case would be the waiver of this fine, worst would be £180?