"Offences outside the United Kingdom (1) If — (a) a United Kingdom national does an act in a country outside the United Kingdom, and (b) the act, if done in England and Wales … would constitute a sexual offence to which this subsection applies, the United Kingdom national is guilty in England and Wales of that sexual offence. … (10) Schedule 2 lists the sexual offences to which this section applies."
"In relation to England and Wales, the following are sexual offences to which subsections (1), (2) and (3) of section 72 apply — … (b) an offence under any of sections 1 to 4, 30 to 41 and 61 where the victim of the offence was under 18 at the time of the offence; …"
"1A In relation to England and Wales, subsections (1) and (2) of section 72 also apply to an offence under any of sections 1 to 4 where the victim of the offence was 18 or over at the time of the offence."
"[7.13] (1) It is a principle of legal policy that, except in relation to procedural matters, changes in the law should not take effect retrospectively. (2) Legislation is retrospective if it alters the legal consequences of things that happened before it came into force. [7.14] (1) Unless the contrary intention appears, an enactment is presumed not to be intended to have a retrospective operation. (2) The strength of the presumption varies from case to case, depending on the degree of unfairness that would result from giving the enactment retrospective effect. (3) The greater the unfairness the clearer the language required to rebut the presumption…"
"… It is necessary to identify some factor which positively indicates that Parliament intended [the section] to operate in respect of offences which predate the [2003] Act. Otherwise, the presumption cannot be rebutted. … "
"1. 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."
"(3) In relation to the jurisdiction of the Crown Court, other than its jurisdiction in matters relating to trial on indictment, the High Court shall have all such jurisdiction to make mandatory, prohibiting or quashing orders as the High Court possesses in relation to the jurisdiction of an inferior court."
"(1) Where a person has been convicted of an offence on indictment in England and Wales, the Commission — (a) may at any time refer the conviction to the Court of Appeal, …"