“On a charge of murder it shall be for the defence to prove that the person charged is by virtue of this section not liable to be convicted of murder.”
“Everyone charged with a criminal offence shall be presumed innocent until proved guilty according to law.”
“Presumptions of fact or law operate in every legal system. Clearly the Convention does not prohibit such presumptions in principle. It does, however, require the Contracting States to remain within certain limits in this respect…. Article 6(2) does not therefore regard presumptions of fact or of law provided for in the criminal law with indifference. It requires States to confine them within reasonable limits which take into account the importance of what is at stake and maintain the rights of the defence.”
“the overriding concern is that a trial should be fair and the presumption of innocence is a fundamental right directed to that end. The Convention does not outlaw presumptions of fact or law but requires that these should be kept within reasonable limits and should not be arbitrary…. The substance and effect of any presumption adverse to a defendant must be examined and must be reasonable. Relevant to any judgment on reasonableness or proportionality will be the opportunity given to the defendant to rebut the presumption, maintenance of the rights of the defence, flexibility in application of the presumption, retention of the ability of the court to assess the evidence, the importance of what is at stake and the difficulty which a prosecutor may face in the absence of a presumption …. The justifiability of any infringement of the presumption of innocence cannot be resolved by any rule of thumb but on examination of all the facts and circumstances of the particular provision as applied in the particular case.”
“The task of the court is never to decide whether a reverse burden should be imposed on a defendant, but always to assess whether a burden enacted by Parliament unjustifiably infringes the presumption of innocence. It may nonetheless be questioned whether (as the Court of Appeal ruled…) ‘the assumption should be that Parliament would not have made an exception without good reason.’ Such an approach may lead the court to give too much weight to the enactment under review and too little to the presumption of innocence and the obligation imposed on it by section 3.”
“If the defendant is being required to prove an essential element of the offence this will be more difficult to justify. If, however, what the defendant is required to do is establish a special defence or exception this will be less objectionable.”
“We do not, in the event, believe it necessary to embark on this interesting debate in the present case for reasons which will appear presently. Whatever may be the true position, it is, in our view, clear that it is less difficult to justify a burden on the defendant, where he has raised an entitlement to a statutory defence, to prove entitlement to that defence than it is to support a requirement that a defendant discharge an onus of proof in relation to an element of the offence.”
“There could be situations where there is an uncooperative defendant. Then it would be very difficult for the prosecution to satisfy the jury of the negative. A defendant is not required to submit to an examination by a doctor and it would not be desirable to change the law to require him to submit to an examination.”
“We have reached this conclusion principally because of what we perceive to be the practical difficulties in the way of requiring the prosecution to prove that a defendant who raises the issue of mental abnormality does not suffer from that condition.”
“While the effect of s. 16(4) on the presumption of innocence is clearly detrimental, given the importance of the objective that the Crown not be encumbered with an unworkable burden and given that I have concluded above that s. 16(4) limits s. 11(d) as little as is reasonably possible, it is my view that there is proportionality between the effects of the measure and the objective.”
“Moreover, faced with the compelling reasoning of this court in Dowds in the context of diminished responsibility, it is inconceivable that different criteria should govern the approach to the issue of voluntary drunkenness, depending on whether the partial defence under consideration is diminished responsibility or loss of control. Indeed, given that in a fair proportion of cases both defences are canvassed before the jury, the potential for uncertainty and confusion which would follow the necessarily very different directions on the issue of intoxication depending on which partial defence was under consideration, does not bear contemplation.”
“(c) a person of D’s sex and age, with a normal degree of tolerance and self-restraint and in the circumstances of D, might have reacted in the same or in a similar way to D”