a forum bar amendment to the extradition act was included in the police and justice act 2006, but has not been brought into effect. the unimplemented bar provision indicates that extradition would be barred if "a significant part of the conduct alleged to constitute the extradition offence is conduct in the united kingdom" and "in view of that and all the other circumstances, it would not be in the interests of justice for the person to be tried for the offence in the requesting territory", taking into account "whether the relevant prosecution authorities in the united kingdom have decided not to take proceedings against the person in respect of the conduct in question."