"No one shall be held guilty of any criminal offence on account of any act or omission which did not constitute a criminal offence under national or international law at the time when it was committed; nor shall a heavier penalty be imposed than the one that was applicable at the time the criminal offence was committed."
"… Article 7(1) will only be infringed if a sentence is imposed on a defendant which constitutes a heavier penalty than that which would have been imposed on the defendant under the law in force at the time that his offence was committed."
"… is not to ensure that the offender is punished in exactly the same way as he would have been punished at the time of the offence, but to ensure that he is not punished more heavily than the relevant law passed by the legislature would have permitted at that time. So long as the court keeps within the range laid down by the legislature at the time of the offence, it can choose the sentence which it considers most appropriate."
"… provided sentences fall within or do not exceed the maximum sentence which could lawfully have been imposed at the date when the offence was committed, neither the retrospectivity principle norArticle 7 of the European Convention are contravened."
"The court is, as has been stated, not concerned to ascertain what sentence would have been passed if the case had been tried shortly after the offence had been committed; it is only concerned to ascertain the statutory maximum. There may, however, be rare cases where a broader inquiry is necessary. An illustration is provided by the appeal of BD where BD was under the age of 14 when he committed some of the indecent assaults. As we set out at paragraph 110, BD could not have been sentenced at the relevant time to any custodial sentence for those offences because of his age. For the reasons we give at paragraphs 111-121, we concluded that, taking into account Article 7 and the common law requirements of fairness, it would not be right to impose on him a custodial sentence for those offences. The appeal in that case is to be contrasted with that of Rouse where, although only a little older, a custodial sentence would have been available at the time of the offending (see paragraph 144). The rare circumstances of the appeal in BD should therefore not operate as encouragement or licence to courts to consider a similar exercise in any other situation."
"(a) The general principle is that the relevant maximum penalty is the maximum penalty available for the offence at the date of the commission of the offence. (b) There is an exception to the general principle where the offender could not have received any form of custodial sentence at the time he committed the offence. (c) The exception is no licence for any broader inquiry. If custody was available at the time of the offending for the offender, the age of an offender at the time of the commission of the offence is relevant solely to the assessment of culpability. The only constraint in those circumstances on the powers of the sentencing court is the statutory maximum for the offence. The court should not analyse the nature of the custody available for a young offender at the time, the maximum length of that custody, the court's powers to commit for sentence as a grave crime or the principles governing sentencing of young offenders, in so far as they go beyond the importance of assessing culpability and maturity."