Alcohol Technical calculations may be required in a number of forensic casework situations and are commonly used in drinking and driving cases.
These guidelines are designed to ensure, where possible, a consistent approach to such casework within the United Kingdom and Republic of Ireland. There are potentially many parameters that could be used for such calculations which could produce a different evidential outcome given the same information. The guidelines are designed to minimise potential problems with forensic alcohol calculations; they are not prescriptive instructions on ‘how to perform’ these calculations.