Government guidelines clearly state 'camera warning and speed limit reminder signs must be placed in advance of fixed, mobile or time/distance speed enforcement taking place'.
Secondly, you say that there is no obligation to highlight speed detection devices, they can hide them behind overgrown trees, is blatantly contrary to the 2011 Government regulations.
Satisfied with your answer? Absolutely not; sorry, I think you've got some explaining to do.
Are you in the UK/ Your clock says 10:22 EST for your last reply. Sounds to me you are somewhere in eastern USA. Please advise. And a reply to my previous question (going to a panel of experts so the caption said). Thanks. John