Road Traffic Act 1988
Driving, or being in charge, when under influence of drink or drugs- Section 4
A person who, when driving or attempting to drive a mechanically propelled vehicle on a road or other public place, is unfit to drive through drink or drugs is guilty of an offence.
Limits: 35 UG (Micrograms) per 100 ML of breath 80 MG of alcohol per 100ML of blood 107MG per 100ML of urine