Ms Moyagh Murdock:

We stay away from trying to guide people because metabolism and body mass differs. The Deputy mentioned the important element that people use different measures, especially at home. We see different measures in everyday life. The size of a scone nowadays is three times the size of a scone 20 years ago so things are all relative.

In terms of mouthwashes and such issues, that is a red herring. The Medical Bureau of Road Safety conducts the tests in its labs in UCD and caters for this aspect. All of this aspect has been researched. The margin of error is fully anticipated in terms of testing someone's sample. Eating some sherry trifle will not put one over the limit.

Ms Burns may come in on this but the morning-after effect is that many people are very fatigued but there is a small trace of alcohol. This is what we are seeing in terms of contributing factors in alcohol-related crashes. There are other reasons that alcohol has contributed to the result of a fatal or serious crash.