"[S]uch delay as there has been in this case is a result of the actions of [the appellant]. She has two young children, but has failed to produce any evidence to show that they could or would not be cared for either by their father or other close members of the family if she were not to be extradited. The offences which she committed are serious in their own right, but taken together show a course of serious criminal conduct which has resulted in a significant period of imprisonment."