Just saw this on BMW owners due to someone speeding he said:
Just seen this post..... an interesting point to note was that I had a family member who was pulled over, and the copper showed him the laser gun. But then this guys asked the copper to prove that laser reading was for his car, and not the car in front, behind, or indeed any other car......the copper said "you done this before?"....to which he replied..."lets just say i know my rights." That was the end of it.
Also, i heard that the copper cant just sit there with the laser out, waiting to catch someone. The law states they have to suspect you are speeding, and then use the laser to prove/check your speed. Also - there should be line of sight between you and the laser, so bascially, they cant/shouldnt hide round a corner to catch people out.
Is the highlighted part true?