" ... the Court of Appeal shall have jurisdiction to hear and determine appeals from any judgment or order of the High Court."
"There is support at first instance with the proposition that, in a public law claim, the court will generally be reluctant to grant interim relief in the absence of a 'strong prima facie case' to justify the granting of an interim injunction ... this is not to say the relevant case law at first instance supports the concept of a 'strong prima facie case' being deployed as a 'threshold' or 'gateway' test in such cases, but rather that the underlying strength of the substantive challenge is likely to be a significant factor in the balance of considerations weighing for or against the granting of an injunction."
"We are not hearing an application for an interim injunction but an appeal. The question is not whether we would have made the same order as the judge, but whether the judge was wrong to make the order that he did. I do not consider that these alleged failings and the judge's treatment of the evidence as such would entitle an appeal court to intervene. Even where a trial judge evaluates evidence given in writing without the benefit of live evidence an appeal court should generally respect his evaluation."
"This applies all the more strongly where the remedy that the judge has granted is a discretionary remedy."
"Only if the lower courts' conclusions are irrational or otherwise plainly incorrect in law will its decision be reversed. As Sir James [ Eadie KC] rightly reminded us, the grant of interim relief is discretionary and the exercise of discretion by a judge should be afforded appropriate deference by the appellate court."
"In doing so, he was not exercising a discretion but was reaching a value judgment based on the evaluation of a number of different factors. In such case, the readiness of an appellate court to interfere with the evaluation of the judge will depend upon all the circumstances of the case. The greater number of factors to be taken into account, the more reluctant an appellate court should be to interfere with the decision of the judge. As I see it, in such circumstances an appellate court should only interfere with that decision if satisfied that the judge erred in principle or was wrong in reaching the conclusion which he did."
"In conclusion, the references cited above show clearly in my view that to limit intervention to a 'significant error of principle' is too narrow an approach, at least if it is taken as implying that the appellate court has to point to a specific principle - whether of law, policy or practice - which has been infringed by the judgment of the court below. The decision may be wrong, not because of some specific error of principle in that narrow sense, but because of an identifiable flaw in the judge's reasoning, such as a gap in logic, a lack of consistency, or a failure to take account of some material factor, which undermines the cogency of the conclusion. However, it is equally clear that, for the decision to be 'wrong' underCPR rule 52.11 (3), it is not enough that the appellate court might have arrived at a different evaluation. As Elias LJ said in R (C) v Secretary of State for Work and Pensions [2016] ... PTSR 1344 para 34: '... the appeal court does not second guess the first instance judge. It does not carry out the balancing task afresh as though it were rehearing the case but must adopt a traditional function of review, asking whether the decision of the judge below was wrong.'."