Some tips on what to do if you are followed by an unmarked Police car
Unmarked Police cars can stop vehicles provided that there is a Constable onboard and that he is in uniform. Unless you are certain that the car behind you indicating for you to stop is an unmarked Police car, do not stop immediately. Instead drive to a well lit place where there are likely to be other people around, such as a petrol station. Do not speed there or try to get away from the unmarked car otherwise they may believe that you are trying to get away from them. Once safely stopped, have your mobile phone at hand and lock the doors and ask the officer to see his ID.