“As a matter of practice in the TCC, technical and expert opinions are frequently expressed by factual witnesses in the course of their narrative evidence without objection being taken. Such opinion evidence does not have the same standing as the evidence of independent experts who are called pursuant toCPR Rule 35 . However, such evidence is usually valuable and usually leads to considerable saving of costs.” 7. Jackson J held at [672] that “in construction litigation an engineer who is giving factual evidence may also proffer (a) statements of opinion which are reasonably related to the facts within his knowledge and (b) relevant comments based upon his own experience.” 8. The practice of the TCC described by Jackson J is consistent with the practice of the County Court and the High Court hearing personal injury claims arising out of factory accidents. In such cases it is common for witnesses of fact to express a view that a particular practice was or was not unsafe. The judge, while making the appropriate discount for the fact that the witness is not independent, may have regard to such evidence. If the witness’ evidence is contentious the opposing party can cross-examine on it. Similarly, in DN v LB of Greenwich[2004] EWCA Civ 1659 the Court of Appeal heard an appeal from a finding by a trial judge that an educational psychologist had been negligent. One of the issues in the appeal concerned the admissibility of opinion evidence given by the psychologist. Brooke LJ said at [26]: “Of course a defendant’s evidence on matters of this kind may lack the objectivity to be accorded to the evidence of an independent expert, but this consideration goes to the cogency of the evidence, not to its admissibility.” 9. But judicial review claims are not treated in the same way, for the reasons given by Leggatt LJ and Carr J in the Law Society case. Moreover, except in rare cases such as R (Al-Sweady) v Secretary of State for Defence[2009] EWHC 2387 (Admin) , cross-examination of witnesses is not permitted in judicial review claims. The Claimants sought an order for cross-examination at an earlier stage of this case but that application was refused. 10. There is no dispute that the Claimants’ witnesses are entitled to draw to the Court’s attention papers published in the period prior to the decisions which are the subject of this claim arguing, for example, that there was a risk of transmission of COVID by people who had no symptoms of it. The extent and weight of that material is an issue of significance in the case, and the Defendants correctly accept that evidence of opinion is admissible where it forms part of the material before the decision-maker whose decision is under challenge. So, the fact that Professor Costello wrote an article published in the Guardian on15 March 2020 arguing that asymptomatic contacts could be highly infectious, and ought to be tested and isolated, is relevant and admissible, but a statement (whether by Professor Costello or anyone else) arguing now that the failure to do so was negligent is not admissible. 11. Evidence is also admissible to show what has taken place in care homes (which is evidence of fact), as opposed to expressions of view as to what should or should not have happened (which is evidence of opinion). 12. There are also a large number of passages in the evidence of Professors Gordon and Costello which are neither evidence of fact nor evidence of opinion, but more in the nature of argument or comments. The same can be said, though not to the same extent, of some passages in the Defendants’ evidence. For example, Mr Surrey, a civil servant in the Department of Health and Social Care, repeatedly describes decisions which were being taken as “appropriate” or “proportionate”
“48. … In so far as these other paragraphs contain comment rather than evidence, I do not propose to go through line by line and remove or specify each comment and have it struck through. That exercise has nothing to recommend it, is unnecessary, and it would be disproportionate to do so. “49. The weight given to the different evidence will be considered by the judge tasked with the substantive judicial review hearing, and that will be done in accordance with the normal approach of the court. Ordinarily, few (if any) judges will be much impressed by witnesses making comments, or telling the court how much expertise they possess in particular fields. … However, the better way to deal with such matters is often for counsel, at the substantive hearing, simply to submit to the court passages where the submission is that little weight ought to be given to specific parts of the evidence of that nature. That is usually a more cost effective and sensible way to proceed than having a full-blown interlocutory battle. There is no risk that the hearing will be prolonged, unduly or at all, by permitting the limited comments included in the statements of [relevant witnesses] presently to remain.” 15. It is unfortunate that the evidence so far filed, in particular the 88-page second witness statement of Professor Gordon, contains facts interwoven with comment and expressions of opinion. It would be disproportionate to require the Claimants’ evidence to be re-submitted, or to embark on a line-by-line editing process ourselves. We do, however, uphold the objection by all the Defendants to the Claimants’ application for permission to adduce a further (third) witness statement of Professor Gordon. Apart from referring briefly to some data from the Office for National Statistics (which, if they are relevant and not already contained in the mass of material before us, can simply be exhibited), this witness statement consists entirely of criticisms of the last round of statements from Professor Hopkins and others. This would, if admitted in evidence, no doubt lead to yet further responses. We agree with Eleanor Grey QC, for the Second Defendants, that the time has come to draw a line. It cannot possibly be said that we are short of material in this case: on the contrary. 16. Mr Coppel referred us to three judicial review cases in which observations were made about the admissibility of expert opinion evidence. These were R (Elayathamby) v Secretary of State for the Home Department[2011] EWHC 2182 (Admin) per Sales J at paragraph 59: Pour v Secretary of State for the Home Department[2016] EWHC 401 (Admin) per Ouseley J at paragraph 111; and Khaled v Secretary of State for the Home Department[2016] EWHC 857 (Admin) per Garnham J at paragraph 12. Each was a case where a judge at first instance was prepared, as an exercise of discretion, to allow expert evidence to be deployed in public law proceedings and to deal with it by reference to the weight that might be attached to it. In each case the exercise of discretion to admit the material turned on the particular facts of the case. In none of those cases was there any discussion of the principles to be applied to the admission of expert evidence in judicial review cases (beyond recitation of the importance of complying withCPR 35 ) or any suggestion that the requirements ofCPR 35 did not apply. 17. We consider that our treatment of the parts of the statements already admitted which take the form of argument - not all of them on the Claimants’ side - should not be excessively purist. Where a witness makes a comment which could have formed part of the written or oral argument of the party adducing his or her evidence, the Court will adopt the same approach as Fraser J did in the Good Law Project case. But where Professor Gordon or Professor Costello goes beyond comment and expresses the opinion that actions of the Defendants were unreasonable or negligent, such evidence of opinion is inadmissible. Does the inclusion of the ECHR claims make any difference? 18. Mr Coppel argued that, even if there were grounds for declining to allow the admission of expert opinion as a matter of domestic law, the position was different as regards claims under the ECHR. He said that Art 2 demanded a much closer scrutiny of the facts by the Court than if the only question was rationality. Furthermore, he said that the court was being asked to proceed, at this interlocutory stage, on the Defendants’ assumption as to the intensity of review which the court ultimately would find was required. He argued that whether the Claimants were entitled to seek to undermine the substantive reasoning of the Defendants was an issue “hotly in dispute”. 19. In response, Sir James Eadie maintained that there are principles of constraint in any judicial review proceeding. Rationality permits the decision maker a range of reasonable responses and there is no different principle applicable for a substantive challenge under the Convention. The Government, he said, is afforded a margin of discretion, and it is only if a governmental decision is outside the reasonable range of responses that a challenge can succeed. That, he said “does not take you to a place that is identical to irrationality, but it takes you very close”. 20. We accept Mr Coppel’s submission that it would be wrong, at this interlocutory stage, to deny him the material on which to argue his case as to the intensity of review required for an Art 2 challenge. That means that he must be able to refer, not just to the material on which the Defendants say they based their decisions, but to all other material to which, with proper enquiry, they had or could reasonably be expected to have had access. For that purpose, the Claimants can make use of the expert assistance they have available. It also means that Mr Coppel must be permitted to argue that the margin of discretion under the Convention available to a government managing a country’s response to the pandemic is much narrower than that afforded by the requirements of rationality. While we say nothing at present as to the strength of the argument, he will be entitled at the substantive hearing to argue that it is enough for him to show simply that the Defendants’ decisions were “wrong”. 21. Nonetheless, we accept Sir James’ submission that there are some “principles of restraint” that delimit the intensity of the Court’s review; even on an Art 2 challenge, the Court will allow the state a margin of appreciation. That margin will reflect the material available to the Defendants at the time. We were shown no authority by Mr Coppel to the effect that a court hearing an Art 2 claim such as this is required to admit not only all the evidence and expert opinion that was considered, or could have been considered, at the time of the decisions under challenge but also opinion evidence which postdates those decisions. 22. Were the position otherwise, and we were required to consider opinion evidence on all the issues raised in this case, whether contemporaneous with the decisions under challenge or not, this claim would become entirely unmanageable. It would become, in effect, a public inquiry without oral evidence. Parliamentary materials 23. The skeleton argument for the Claimants and some of the evidence they produce contains references to observations of a parliamentary committee and some of individual members expressing strong criticism of the Defendants’ handling of the pandemic, in particular the fact that patients were discharged from hospitals into care homes. Mr Coppel accepted, however, that opinions of a parliamentary committee or of an individual member of either House, however distinguished, are inadmissible. The law on this subject is conveniently set out in three High Court decisions, R (Bradley and others) v Secretary of State for Work and Pensions[2007] EWHC 242 (Admin) at [26]-[35]; Office of Government Commerce v Information Commissioner[2010] QB 98 , the latter (generally known as the OGC case) being endorsed by the Court of Appeal in Reilly v Secretary of State of Work and Pensions[2017] QB 657 ; and Kimathi and others v Foreign and Commonwealth Office[2018] 4 WLR 48 . 24. The references to the opinions of the Public Accounts Committee are clearly inadmissible, as are the observations of Greg Clark MP and Jeremy Hunt MP. Parliamentary material, including reports of the Joint Committee on Human Rights (JCHR) may also sometimes be referred to when determining whether legislation is compatible with the ECHR (see the judgment of David Richards LJ in R (Project for the Registration of Children as British Citizens) v Secretary of State for the Home Department[2021] 4 All ER 445 ;[2021] EWCA Civ 193 ), but that exception does not assist the Claimants in the present case. 25. A more nuanced issue is when it is sought to adduce evidence given to a Select Committee. In the Bradley case, I refused to allow evidence given by the Ombudsman to a Select Committee to be relied on, accepting the submission of Clive Lewis QC on behalf of the Speaker that to do so would inhibit freedom of speech in Parliament; but noted that it would have been open to the Ombudsman, if she had wished to do so, to put the substance of that evidence into a witness statement or other public document which could have been used in court. That is more problematic where the statement is made by a witness employed by an opposing party. In the OGC case Stanley Burnton J said at [64] that “if the evidence given to a committee is uncontentious, i.e. the parties to the appeal before the tribunal agree that it is true and accurate, I see no objection to its being taken into account.”
“we know that the incubation period ranges between three and five days. For people who are asymptomatic, they may have been asymptomatic for some period before symptoms appeared”