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Frequently Asked Questions

Do you have a question about policing or the law? You may be able to find the answer here.

Through our frequently asked questions section we aim to help you find the answers you need without having to call us to ask for information. We've provided answers to questions on a range of topics which are regularly asked of police forces up and down the country.

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If a police constable reasonably suspects you are/have been driving, attempting to drive or in charge of a motor vehicle on a road or public road and:

  • You are under the influence of alcohol or drugs e.g. breath smells of intoxicants, or
  • You have committed a moving traffic offence e.g. going through a red light, or
  • You have been involved in an accident

The PC can require that you take a preliminary breath test, field impairment test (FIT) or chemical drug test- PC must be in uniform to conduct these tests. See the flow chart below for the more information.

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Answers in this FAQ section are provided by the 'Ask the Police' website. Produced by the Police National Legal Database (PNLD) team, 'Ask the Police' is an official police site approved by the National Police Chiefs Council (NPCC). All FAQ answers are © PNLD.