A few points.
1 - I am
not the only one who feels the speed limit at that camera is unclear.
2 - I am aware of the street light rule as I did a speed awareness course 6 years ago, the street light rule is useful but not infallible
in the real world with cars flying past you and/or a queue behind you.......
It was not coincidental that 2019 speeding ticket (35mph in a 30....) was also when I was on holiday in an unfamiliar location. I have spoke to many friends and colleagues and it's the same story for almost all of the speeding tickets they have had, and none of them are drivers going around speeding and only getting caught because they don't know where the cameras are. They got caught because the speed limit was unclear and unexpected. Exactly like mine.
3 - The bottom line : Bearing the above in mind you appear not to think the speed limit at speed cameras should be made be clear enough that local knowledge makes you less likely to get prosecuted ?