[tweetiepooh]

Some Sat Nav's now link to phones to get extra data so if stopping the phone "working" when moving would then stop that function working unless there are exceptions in the coding then how would you make the exceptions.

With hand held phones it's also easy to police. You do not need to make that call while driving, especially on hand held unit. You don't need to receive that call either. My work phone uses the SatNav as hands free and if I get called I just tell the person I'm driving and when I can focus on their call. If it's simple I may give an answer but else the other person just has to wait.

With the police the exemption you do have to remember that unlike normal callers the other end is likely to be aware of the driver situation and the conversation is often linked to the situation. The police driver is also trained for the situation and likely would not reply immediately if unsafe.