"79. Finally under this heading, we briefly explain why we dismissed BAA's application to adduce the new expert evidence. In doing so, we simply applied the conventional approach in judicial review proceedings as laid down in R v Secretary of State for the Environment, ex p. Powis[1981] 1 WLR 584 , 595-597. The new evidence did not fall into any of the categories identified there of material which will be admitted as evidence on a judicial review: it was not evidence to show what material was before the CC, nor was it relevant to any jurisdictional question affecting the CC, nor was it relevant to any allegation that the actions of the CC were tainted by misconduct. Mr Green submitted that it was evidence which should be admitted to enable the Tribunal to carry out its review function properly, relying on the modest adjustment to the Powis categories which Collins J was prepared to accept in R (Lynch) v General Dental Council[2004] 1 All ER 1159 , at [23]-[25]. Unlike in Lynch , we were not at all persuaded that we needed to see the expert reports in order to understand the submissions made by Mr Green under Ground (4). 80. We also make this general point. In our view, attempts to introduce detailed technical expert evidence in reviews under section 179 of the Act should be strongly discouraged and disallowed other than in very clear cases. Otherwise, there is an obvious danger that costs will be wastefully multiplied with no significant benefit for the speedy and efficient dispute resolution procedure which is supposed to be provided for by a section 179 review, as with judicial review generally. That is what happened here. Because BAA obtained the (no doubt expensive) report of its expert and sought to adduce it, the CC felt obliged to go to the expense and trouble of instructing an expert of its own to produce a report to be adduced in answer. In the event, neither report was admitted into evidence. On the other hand, were expert evidence to be admitted on the hearing of a review under section 179, there would be a real danger that time and effort would be expended in argument upon it which does not on proper analysis advance the legal arguments in the case, but operates rather as a distraction from them (and argument about expert reports is likely to be inconclusive as well, in the absence of the contending experts being called to give oral evidence and be cross-examined, which is not in the ordinary course a procedure appropriate in proceedings which are intended to be determined by reference to judicial review principles). 81.The Competition Appeal Tribunal Rules 2003 can be read as suggesting that expert reports may be expected to be adduced in evidence: see Rule 8(6)(b) (which provides that there shall "as far as practicable" be annexed to the notice of appeal "a copy of every document on which the appellant relies including the written statements of all witnesses of fact, or expert witnesses, if any") and Rule 25 (which provides that, inter alia, Part II of the Rules, which includes Rule 8, applies to proceedings under section 179). But this is because the main body of the Rules, and Part II in particular, is concerned with the Tribunal's appellate jurisdiction, in relation to which expert and other evidence will not infrequently be admissible and relied upon, and provisions which make sense in that context are then simply applied across to reviews under section 179 by cross-reference in Rule 25."
"… we refer to the following paragraphs of the Mazzarotto Report: 2.3.5; 2.3.17; 2.3.23; 2.3.27; 3.2.11-12; 3.2.25; 4.4.3") and generally. (iv) HCA say that the Tribunal would be assisted by Dr Mazzarotto's evidence regarding the adequacy of the testing undertaken by the CMA - see para. 31 of its skeleton argument dated23 June 2014 , where this is said: "31. In addition to specific criticisms such as these, the Mazzarotto Report contains expert assessment of the adequacy of the tests undertaken by the CMA, or its reporting of those tests, including an identification of tests that the CMA ought to have undertaken as standard, but which appear to be missing from its analysis (see for instance §2.3.12). The question whether the overall analysis is consistent with the basic requirements of good economic practice is again a matter on which the Tribunal is likely to be assisted by the opinion of an expert."
"278. The IPA [Insured Prices Analysis] (as relied on in the Final Report) was not disclosed or put to HCA or its advisers during the investigation. HCA, and Dr. Mazzarotto on its behalf, was accordingly unable to respond to it. HCA relies on this procedural unfairness as the first of its grounds. The expert report of Dr. Mazzarotto is relevant to that ground as follows: a. It evidences the points which HCA would have sought to put forward to the CMA during the investigation, had it been given proper notice of the IPA; b. It provides the CAT with material necessary to enable it to cure what would otherwise be a breach ofArticle 6 ECHR , by affording to HCA a fair hearing in the determination of its civil rights and obligations. 279. HCA's second ground identifies flaws in the IPA which constitute the taking account of irrelevant considerations and/or the failure to take account of relevant considerations. As a result, the IPA was not material on which the CMA could rationally rely in support of its decision. Dr. Mazzarotto's expert report is relevant to this ground. This material could not have been put forward by HCA during the investigation because of the procedural unfairness identified under ground 1. 280. HCA's fifth ground challenges the proportionality of the remedy adopted by the CMA, and its compatibility with HCA's right to property under Article 1 of the First Protocol ECHR. The determination of proportionality requires the Tribunal to make its own assessment of the material relied on by the CMA, including the IPA. The expert report of Dr. Mazzarotto is relevant to that assessment. For example, his report includes an examination of the sensitivity of the CMA's quantitative assessment, for which legal submission could provide no substitute."
"23. The question of the appropriate standard of review to be adopted in this case is a legal issue of importance, which will require submissions at the hearing of the Main Application. It [ sic ] submitted that it would be wrong in principle for the Tribunal at this preliminary stage to exclude evidence which would deny to it the material necessary to apply what the Applicant submits is the appropriate level of scrutiny to the Decision."