OP, you could take photos easily, so I suggest you do. Also, where are the councils photos?
@John UK, Poirotesque sleuthing is all well and good but we don't know where the OP's car was parked and this sign's relevance.
And for the benefit of other readers, as regards GSV there are moment in time shots (covering as long as it took the GSV vehicle to traverse the road) from Jun 2023, Apr 2012 and 2009 in each of which the majority of cars is parked on the carriageway, even after the parking bay markings had been placed. Closer inspection suggests a correlation between limited specific locations and parking on the footway i.e. vehicles in the immediate vicinity of the Churchville junction.
OP, over to you for the council's photos pl and the backstory.