mobile speed camera

[Rotty]

IIRC it's correct?

I thought that it was a necessity that you had corroboration for excess speed. One being your own opinion, the other being the laser which confirms your belief.

Yes the lasers can get you from thousands of metres away, often they will only get you from around 200metres away on a dual carriageway.

afaik it is correct, well in theory anyway, the reality is quite different though

 

[Kenai]

Bit o' Googlin' suggests it's ACPO guidelines, though it's not very specific about how (or if) the officer must demonstrate this prior opinion.