Legality of speed camera position?

[Max Preload]

And here it is graphically.

[Max Preload]

I don't have time now.. but I will calculate an error chart. Is the correct angle supposed to be 22.5deg ? Is that from the roadside ?

I believe it is. In which case:
Excel file password for editing is kiwibiker. But you can change the magenta fields without it.

[Pixie]

I got one from a camera van too on a passing lane (112k) just passing a large truck & trailer then slowed and popped back into the left lane. See loads of vans on the m/way and the cops with lasers sitting on downhill inclines. So what about road safety then? Wouldn't crash stats tell them where to patrol? Yeah they get some speeders but really, is that the best use of their resources?

If it makes money it's all good