And yet the one-way sign is visible and it indicates a legal requirement, which brings into question the council's administrative and organisational competence which might bear fruit...but it's a long-shot.
I must say that the presence of the dividing line with the adjacent post and traffic sign suggests that perhaps there was/is a P&D place to the left. And if you look at the far end you'll see the same sign...and what could be seen as end-bay markings. Odd.
cp has a way of getting relevant traffic orders in double-quick time, so perhaps he will be able to obtain this.
In the meantime, as per DD, I think you should make reps on the grounds that the sign was unclear. Remember, all the authority have is the CEO's notes and photos, and the photos are blurred and unreadable, so if you say that part of the sign was unreadable they couldn't know otherwise other than to look, they couldn't rely on the CEO's photos which neither confirm nor deny your assertion.