The House of Lords upheld an appeal by Mr Ian Norris against a decision to extradite him to the United States to face price-fixing charges. A UK citizen can be extradited to face criminal prosecution in another country if the conduct of which he or she is accused is criminal both in the UK and in the requesting country. The cartel in which Mr Norris was allegedly involved took place before 2003 when the Enterprise Act made price-fixing a criminal offence in the UK. The House of Lords found that prior to the entry into force of the Enterprise Act, in the absence of “aggravating factors” (such as fraud, intimidation or violence), price-fixing was not a criminal offence under common law. Because Mr Norris’s behaviour could not be deemed criminal in the UK he could not be extradited to the US to be tried for price-fixing. However, the House of Lords referred the case back to the district magistrates’ court and this court has recently determined that extradition was warranted on the ground of obstruction of justice. The Home Secretary must now decide whether to approve extradition on this ground.