The Manual of Guidance on Drink and Drugs, more commonly known as the MGDD, is a set of forms used by the police when dealing with drink driving and drug driving offences. They contain the procedure that should be followed, as well as the questions that should be asked. The forms also contain the crucial statutory warning that should be read to anyone who is about to provide a breath, blood or urine sample for analysis. These are standard forms, which are updated in line with changes in statutes, and have to be agreed by the CPS before publication.
There have been various versions of the MGDD forms published, as they are amended and updated to adapt to changes in the law. The newest versions of the MGDD A, B and C forms were updated in November 2017. The MGDD D, E and F forms were published in October 2012. There are 6 MGDD forms as follows: