"We heard the said information on the 6 and 14 of September 2006 and found the following facts: (a) That the respondent had driven the Alfa Romeo between his home at the Warwick Arms Public House and Pizza Hut on Two Mile Hill Road on the night of the18 February 2006 . (b) There was a gap of 2½ to 2¾ hours between the respondent having driven and the station breath test being undertaken. (c) That the respondent had drunk up to 3 double vodkas with Red Bull after he had driven and before the police arrived at the Warwick Arms."
"Accordingly, we were not sure beyond reasonable doubt that the respondent was over the limit at the time of the offence, and we therefore acquitted him of the charge."
"The court accepts that the wrong standard of proof/test was applied, as set out in the justices' reasons (copy attached)."
"Evidence of the proportion of alcohol or any drug in a specimen of breath, blood or urine provided by the accused shall, in all cases (including cases where the specimen was not provided in connection with the alleged offence), be taken into account and, subject to sub-section(3) below, it shall be assumed that the proportion of alcohol in the accused's breath, blood or urine at the time of the alleged offence was not less than in the specimen."
"That assumption shall not be made if the accused proves - (a) that he had consumed alcohol before he provided the specimen and - (i) in relation to an offence under section 3A, after the time of the alleged offence, and (ii) otherwise, after he had ceased to drive, attempted to drive or be in charge of a vehicle on a road or other public place, and (b) that had he not done so the proportion of alcohol in his breath, blood or urine would not have exceeded the prescribed limit ..... "
"I am most reluctant to establish a rule which will be oppressive on defendants by requiring them to call, provide and pay for expert evidence in all cases of this kind, but I am eventually persuaded at the end of the argument that, unless the case really is an obvious one, unless the case is one where a layman can reliably and confidently say that the added liquor must explain the excess of alcohol, the only way in which a defendant can discharge the onus is by calling medical evidence. One will assume and hope that these cases will not be very frequent, but I reach the conclusion at the end of the case that where the facts are not obvious to a layman in the medical sense, it will be necessary for the defendant to call medical evidence in order to discharge the onus of proof which rests on him."
"The present case is, in our view, different from both Lambert and Carass in material respects. First, the offence of driving while over the legal limit is not an offence which requires the court to ascertain the intent of the accused at all. Conviction follows after a scientific test which is intended to be as exact as possible. Secondly, in most cases such test is exact or, to the extent it is less than exact, the inexactness will work in favour of the accused. Thirdly, it is the accused himself who, by drinking after the event, defeats the aim of the legislature by doing something which makes the scientific test potentially unreliable. There is a distinct danger that in many (perhaps the majority of cases) the accused will have taken alcohol after the event for the precise purpose of defeating the scientific test. Fourthly, the relevant scientific evidence to set against the result ascertained from the specimen of breath or blood is all within the knowledge (or means of access) of the accused rather than the Crown. This evidence will include: (1) the amount which the accused had to drink after the incident; (2) what is called his 'blood-breath ratio', important for calculating the rate at which his body absorbs alcohol; (3) the rate at which his body eliminates alcohol over time; (4) the accused's body weight."