My snooper says I'm doing 70mph and my speedo says 77mph (approx). I understand the snooper ias probably more accurate but:
1. What speed would a camera or mobile scamera van show if I was doing 77 mph?
2. ACPO guidelines say police give 10% +2mph over speedlimit so does that mean I can drive at a speed of 75mh on my snooper and approoaching 90mph on my speedo whilst on a motorway and still be safe?