GSV is dated Feb 2023, and the markings are pretty well worn out on that view of nearly 3 years ago. The law is that if you park in a marked-out bay, the onus is on you to determine what restrictions may apply. However, here, even though there is a sign, if you parked some distance from it, there is no requirement to look, because as far as you can see, there are no parking bay markings.
However, such is the greed for cash with councils, that it is almost inevitable they will reject any representations you submit as an immediate challenge. The next stage, if you don't pay, is the service of a Notice to Owner to the person on the V5C Registration Certificate (what used to be called the "Log Book", because it was a complete record of the keepers).
So the question is, are you the V5C holder and if so, is the address up-to-date ?