@ellamegansamuel slightly revised draft:
Dear Tunbridge Wells Borough Council,
I parked on this occasion as I had often done before in the long, undivided bay. I had no reason to go to the back of my car, I walked forwards from my car and glanced at the parking timeplate as I went, the sign had no indication of a suspension and every space was filled with cars.
I then walked to Caffè Nero and went in for a coffee, sitting almost opposite the car. One car had a ticket, and I assumed he had been there for longer than an hour; no other cars had tickets.
The traffic warden walked along, looked at the other cars, but when he got to mine he started taking photos. I came out of the cafe and explained I had been there for less than an hour, and at this point he pointed out the signs added to the posts saying there was a suspension.
On looking at the sign, there was a piece of white paper taped onto the yellow sign; the location mentioned bays that do not correlate to the markings of the bay markings and the sign was flat rather than three-dimensional as parking suspension signs normally are.
If the timeplate ahead of my car had had a three-dimensional parking suspension sign there is no way I could have missed it, and I would have been alerted to the suspension.
There was nothing that clearly marked out anything different to the usual parking arrangements, the reason my car was parked where it was is ultimately because the local authority did not provide adequate notice of the suspension.
In the circumstances the contravention did not occur and the penalty charge should be cancelled.
Do not cut down the text, if it doesn't fit in the text box on the council website just put it in a PDF and upload it as an attachment. Also please take a screenshot of the confirmation page.