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    Q890: I've heard that if I don't exceed the speed limit by a certain amount I won't be prosecuted- is this correct?

    Guidance issued by the National Police Chiefs Council (NPCC) suggests when enforcement action will be taken against speeding motorists – this is usually when the relevant speed limit is exceeded by 10% plus 2 mph. However, this is for guidance purposes only, a police officer has the discretion to act outside it. Some drivers wrongly interpret it to mean that they can legally exceed the speed limit – this is most definitely not the case.

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