Ms Velma Burns:

Yes. We ask road users to be sensible. We want them to know that if they get behind the wheel in the morning but had ten pints beforehand that they should do the maths. For example, one of the messages that we have communicated previously was that it takes about an hour for a unit of alcohol to be processed by the body. People need to exercise personal responsibility and use common sense to a certain extent. It is a complicated science and we defer to the Medical Bureau of Road Safety for the detail on this matter.