They say they've considered everything you've said, but that's a lie:
(https://i.imgur.com/iq9WB2b.png)
Just send this as your formal representation:
Dear London Borough of Hounslow,
I require you to consider my informal representations as my formal representations.
Yours faithfully,
Make it nice and easy for them to send a formal notice of rejection without bothering to consider anything at all.
Draft reps, don't use your own youtube link, use the one I will PM to you. Do not open the link, if the video count remains at zero views we can then prove that they never looked at it, and that is a failure to consider and thus a procedural impropriety.
Dear London Borough of Hounslow,
I would like to request cancellation of PCN NJ38706354 because at the material time I was loading goods into my car, and the shop is in close proximity to where I parked. To illustrate the point I have placed a video at (link) which I invite you to review.
In light of the above I am sure you will agree the PCN should be canceled. I attach a receipt from the shop.
Yours faithfully,