“27 Court’s powers on appeal under section 26 (1) On an appeal under section 26 the High Court may— (a) allow the appeal; (b) dismiss the appeal. (2) The court may allow the appeal only if the conditions in subsection (3) or the conditions in subsection (4) are satisfied. (3) The conditions are that— (a) the appropriate judge ought to have decided a question before him at the extradition hearing differently; (b) if he had decided the question in the way he ought to have done, he would have been required to order the person’s discharge.”
“21. …we heard substantial argument on the passages in the judgment of Lord Neuberger [in Re B (A Child)[2013] UKSC 33 (“Re B”)]. Lord Neuberger set out at paragraph 93 the ways an appellate judge might consider a trial judge’s conclusion on proportionality: “There is a danger in over-analysis, but I would add this. An appellate judge may conclude that the trial judge's conclusion on proportionality was (i) the only possible view, (ii) a view which she considers was right, (iii) a view on which she has doubts, but on balance considers was right, (iv) a view which she cannot say was right or wrong, (v) a view on which she has doubts, but on balance considers was wrong, (vi) a view which she considers was wrong, or (vii) a view which is unsupportable. The appeal must be dismissed if the appellate judge's view is in category (i) to (iv) and allowed if it is in category (vi) or (vii). “There is a danger in over-analysis, but I would add this. An appellate judge may conclude that the trial judge's conclusion on proportionality was (i) the only possible view, (ii) a view which she considers was right, (iii) a view on which she has doubts, but on balance considers was right, (iv) a view which she cannot say was right or wrong, (v) a view on which she has doubts, but on balance considers was wrong, (vi) a view which she considers was wrong, or (vii) a view which is unsupportable. The appeal must be dismissed if the appellate judge's view is in category (i) to (iv) and allowed if it is in category (vi) or (vii). 94. As to category (iv), there will be a number of cases where an appellate court may think that there is no right answer, in the sense that reasonable judges could differ in their conclusions. As with many evaluative assessments, cases raising an issue on proportionality will include those where the answer is in a grey area, as well as those where the answer is in a black or a white area. An appellate court is much less likely to conclude that category (iv) applies in cases where the trial judge's decision was not based on his assessment of the witnesses' reliability or likely future conduct. So far as category (v) is concerned, the appellate judge should think very carefully about the benefit the trial judge had in seeing the witnesses and hearing the evidence, which are factors whose significance depends on the particular case. However, if, after such anxious consideration, an appellate judge adheres to her view that the trial judge's decision was wrong, then I think that she should allow the appeal.” 23. In the light of the argument before us, we entirely endorse the general approach adopted by Beatson LJ and Aikens LJ, but consider that application of that approach by use of the analysis in the judgment of Lord Neuberger is likely to achieve a more consistent approach that is compliant with Article 8 and the provisions of the 2003 Act dealing with appeals. 24. The single question therefore for the appellate court is whether or not the district judge made the wrong decision. It is only if the court concludes that the decision was wrong, applying what Lord Neuberger said, as set out above, that the appeal can be allowed. Findings of fact, especially if evidence has been heard, must ordinarily be respected. In answering the question whether the district judge, in the light of those findings of fact, was wrong to decide that extradition was or was not proportionate, the focus must be on the outcome, that is on the decision itself. Although the district judge’s reasons for the proportionality decision must be considered with care, errors and omissions do not of themselves necessarily show that the decision on proportionality itself was wrong.”
“25. The statutory appeal power in section 104(3) permits an appeal to be allowed only if the district judge ought to have decided a question before him differently and if, had he decided it as he ought to have done, he would have had to discharge the appellant. The words "ought to have decided a question differently" (our italics) give a clear indication of the degree of error which has to be shown. The appeal must focus on error: what the judge ought to have decided differently, so as to mean that the appeal should be allowed. Extradition appeals are not re-hearings of evidence or mere repeats of submissions as to how factors should be weighed; courts normally have to respect the findings of fact made by the district judge, especially if he has heard oral evidence. The true focus is not on establishing a judicial review type of error, as a key to opening up a decision so that the appellate court can undertake the whole evaluation afresh. This can lead to a misplaced focus on omissions from judgments or on points not expressly dealt with in order to invite the court to start afresh, an approach which risks detracting from the proper appellate function. That is not what Shaw or Belbin was aiming at. Both cases intended to place firm limits on the scope for re-argument at the appellate hearing, while recognising that the appellate court is not obliged to find a judicial review type error before it can say that the judge's decision was wrong, and the appeal should be allowed. 26. The true approach is more simply expressed by requiring the appellate court to decide whether the decision of the district judge was wrong. What was said in Celinski and Re B (A Child) are apposite, even if decided in the context of article 8. In effect, the test is the same here. The appellate court is entitled to stand back and say that a question ought to have been decided differently because the overall evaluation was wrong: crucial factors should have been weighed so significantly differently as to make the decision wrong, such that the appeal in consequence should be allowed.”
“When an issuing state seeks an individual who has fled outside its borders to evade its justice system, without indicating which country he has fled to, that state is under no obligation to devote resources to making enquiries about his whereabouts. By the same token, a decision by an issuing state to enter an alert on SIS, without more, does not trigger an obligation on the judicial authority or police force of every other Member State to check its own official records or otherwise search for the individual concerned. In this situation, as the Divisional Court put it in RT, “neither the foreign judicial authority nor the NCA can be expected to explore the byways and alleyways of British officialdom to discover whether someone is in this country”
“There is a constant and weighty public interest in extradition: that people accused of crimes should be brought to trial; that people convicted of crimes should serve their sentences; that the United Kingdom should honour its treaty obligations to other countries; and that there should be no "safe havens" to which either can flee in the belief that they will not be sent back.”