“24. … the right of appeal is confined to errors of law. The only way in which the findings at paragraph [10] of the decision of the First-tier Tribunal should be disturbed is on the basis of ignorance or mistake of fact giving rise to unfairness.”
“The parties both have a duty to co-operate with the Tribunal to further the overriding objective to deal with cases fairly and justly. The parties both have a duty to ensure … that a Tribunal reaches its decision on the correct factual basis, and that the Judge reaches a decision with the confidence that both parties have acted in accordance with their duty of candour, and with all the relevant evidence and information before the Tribunal. … If the Tribunal’s attention had been drawn to the evidence or … the fact that the evidence had been considered in a judicial review claim, albeit in the context of a challenge on public law grounds, I am quite satisfied Judge Black could not reasonably have concluded that the basis of the refusal in terms of the appellant’s undesirability amounted to an unsubstantiated assertion, and that the mistaken impression that there was no evidence, played a material part in the reasoning for the finding made.”
“120. The starting-point is that it seems to me clear that if on a human rights appeal an appellant were found not to have cheated, which inevitably means that the s.10 decision had been wrong, the Secretary of State would be obliged to deal with him or her thereafter so far as possible as if that error had not been made, i.e. as if their leave to remain had not been invalidated. … In a straightforward case, for example, she could and should make a fresh grant of leave to remain equivalent to that which had been invalidated. She could also, and other things being equal should, exercise any relevant future discretion, if necessary “outside the Rules”, on the basis that the appellant had in fact had leave to remain in the relevant period notwithstanding that formally that leave remained invalidated. (I accept that how to exercise such a discretion would not always be easy, since it is not always possible to reconstruct the world as it would have been; but that problem would arise even if the decision were quashed on judicial review …) If it were clear that in those ways the successful appellant could be put in substantially the same position as if the s.10 decision had been quashed, I can see no reason in principle why that should not be taken into account in deciding whether a human rights appeal would constitute an appropriate alternative remedy. …”
“63. In our view, the Criminal Injuries Compensation Board case[1999] 2 AC 330 points the way to a separate ground of review, based on the principle of fairness. It is true that Lord Slynn distinguished between “ignorance of fact” and “unfairness” as grounds of review. However, we doubt if there is a real distinction. The decision turned, not on issues of fault or lack of fault on either side; it was sufficient that “objectively” there was unfairness. On analysis, the “unfairness” arose from the combination of five factors: (i) an erroneous impression created by a mistake as to, or ignorance of, a relevant fact (the availability of reliable evidence to support her case); (ii) the fact was “established”, in the sense that, if attention had been drawn to the point, the correct position could have been shown by objective and uncontentious evidence; (iii) the claimant could not fairly be held responsible for the error; (iv) although there was no duty on the Board itself, or the police, to do the claimant’s work of proving her case, all the participants had a shared interest in co-operating to achieve the correct result; (v) the mistaken impression played a material part in the reasoning.”
“66. In our view, the time has now come to accept that a mistake of fact giving rise to unfairness is a separate head of challenge in an appeal on a point of law, at least in those statutory contexts where the parties share an interest in co-operating to achieve the correct result. Asylum law is undoubtedly such an area. Without seeking to lay down a precise code, the ordinary requirements for a finding of unfairness are apparent from the above analysis of the Criminal Injuries Compensation Board case. First, there must have been a mistake as to an existing fact, including a mistake as to the availability of evidence on a particular matter. Secondly, the fact or evidence must have been “established”, in the sense that it was uncontentious and objectively verifiable. Thirdly, the appellant (or his advisers) must not have been responsible for the mistake. Fourthly, the mistake must have played a material (not necessarily decisive) part in the tribunal’s reasoning.”
“91. In summary, we have concluded in relation to the powers of this court: (i) an appeal to this court on a question of law is confined to reviewing a particular decision of the tribunal, and does not encompass a wider power to review the subsequent conduct of the Secretary of State; (ii) such an appeal may be made on the basis of unfairness resulting from “misunderstanding or ignorance of an established and relevant fact” (as explained by Lord Slynn in the Criminal Injuries Compensation Board[1992] 2 AC 330 and Alconbury cases[2003] 2 AC 295 ); (iii) the admission of new evidence on such an appeal is subject to Ladd v Marshall principles, which may be departed from in exceptional circumstances where the interests of justice require. 92. In relation to the role of the IAT, we have concluded (i) the tribunal remained seized of the appeal, and therefore able to take account of new evidence, up until the time when the decision was formally notified to the parties; (ii) following the decision, when it was considering the applications for leave to appeal to this court, it had a discretion to direct a rehearing; this power was not dependent on its finding an arguable error of law in its original decision; (iii) however, in exercising such discretion, the principle of finality would be important. To justify reopening the case, the IAT would normally need to be satisfied that there was a risk of serious injustice, because of something which had gone wrong at the hearing, or some important evidence which had been overlooked; and in considering whether to admit new evidence, it should be guided by Ladd v Marshall principles, subject to any exceptional factors. We should emphasise that this analysis is based on the regime applicable to this case, under which the right of appeal to the IAT was not confined to issues of law (before the change made by the 2002 Act, section 101: see para 17 above).”
“In order to justify the reception of fresh evidence or a new trial, three conditions must be fulfilled: first, it must be shown that the evidence could not have been obtained with reasonable diligence for use at the trial; second, the evidence must be such that, if given, it would probably have an important influence on the result of the case, although it need not be decisive; third, the evidence must be such as is presumably to be believed, or in other words, it must be apparently credible, although it need not be incontrovertible.”