"Where, as here, the interpretation and application of a specialised statutory scheme has been entrusted by Parliament to the new tribunal system, an important function of the Upper Tribunal is to develop structured guidance on the use of expressions which are central to the scheme, and so as to reduce the risk of inconsistent results by different panels at the First Tier level." (para 41) This was consistent with the approach of the preceding White Paper (paras 7.14-21), which had spoken of the intended role of the new appellate tier in achieving consistency in the application of the law, "law" for this purpose being widely interpreted to include issues of general principle affecting the jurisdiction in question. Such a flexible approach was supported also by recent statements in the House of Lords, in cases such as Moyna v Secretary of State for Work and Pensions[2003] 1 WLR 1929 and Lawson v Serco[2006] ICR 250 .In the latter case (para 34), Lord Hoffmann had contrasted findings of primary facts with the "an evaluation of those facts" to decide a question posed by the interpretation of the legislation in question: "
“Wisniewski is not authority for the proposition that there is an obligation to draw an adverse inference where the four principles are engaged. As the first principle adequately makes plain, there is a discretion i.e. "the court is entitled [emphasis added] to draw adverse inferences” 153. He also made clear that such matters as proportionality may give rise to a valid reason for a witness’s absence. 154. In my judgment the point can be dealt with relatively briefly thus: i) This evidential “rule” is, as I have indicated above, a fairly narrow one. As I have noted previously ([2018] EWHC 1768 (Comm) at [115]), the drawing of such inferences is not something to be lightly undertaken. ii) Where a party relies on it, it is necessary for it to set out clearly (i) the point on which the inference is sought (ii) the reason why it is said that the “missing” witness would have material evidence to give on that issue and (iii) why it is said that the party seeking to have the inference drawn has itself adduced relevant evidence on that issue. iii) The Court then has a discretion and will exercise it not just in the light of those principles, but also in the light of: a) the overriding objective; and b) an understanding that it arises against the background of an evidential world which shifts - both as to burden and as to the development of the case - during trial. iv) In this case, save as to one very narrow issue with which I will deal at the appropriate point below, the exercise required of the parties relying on this principle has not really been done. …”