"21. In my judgment, the authorities discussed above establish that it is exceptional to limit access to documents in the case to external eyes only, so that no representative from the party which is subject to the restriction can see and understand those documents. An external eyes tier does not require justification for the restriction by reference to individual documents. It enables one party to decide to exclude all representatives of the opposite party from access to any document that it chooses, and places the onus on the party seeking access to apply to court to obtain it. That approach, in my judgment, is wrong in principle… … 24. An external, eyes only, tier enables a blanket exclusion of access by one of the parties to the relevant parts of key documents. This is incompatible with the right to a fair hearing underArticle 6 of the European Convention on Human Rights , and with the principles of natural justice. It is incompatible with the obligations of lawyers to their clients. The principles on which solicitors are obliged to act on behalf of clients instructing them require the sharing of all relevant information of which they are aware." 10. Similarly, Roth J stated in Infederation v. Google: "…In my view, the important points to emerge from the authorities are that: (i) such arrangements [that is, confidentiality rings excluding a client, party to the proceedings] are exceptional; (ii) they must be limited to the narrowest extent possible; and (iii) they require careful scrutiny by the court to ensure that there is no resulting unfairness. Any dispute over admission of an individual to the ring must be determined on the particular circumstances of the case."
"In my judgment, the authorities discussed above establish that it is exceptional to limit access to documents in the case to external eyes only, so that no representative from the party which is subject to the restriction can see and understand those documents. An external eyes tier does not require justification for the restriction by reference to individual documents. It enables one party to decide to exclude all representatives of the opposite party from access to any document that it chooses, and places the onus on the party seeking access to apply to court to obtain it. That approach, in my judgment, is wrong in principle." 34. I agree that an external eyes only tier is exceptional. I also agree that it is wrong to place the onus on the receiving party to establish that a document is non-confidential. I do not agree, however, that an approach where prima facie highly confidential documents are first disclosed on an external eyes only basis is wrong in principle. The authorities establish that staged or progressive disclosure of confidential information is permissible. Indeed, later in his judgment, Henry Carr J said this at [23(iv)]: "external eyes only access to individual documents of peripheral relevance, whose disclosure would be damaging, may be justified in specific cases…". 35. It appears that what concerned Henry Carr J was "the exclusion of access by one of the parties to the relevant parts of key documents" (see [24]). I agree that that should not be the result of the establishment of an external eyes only tier. 36. It is worth pondering an alternative approach under which all documents which a party contended should be AEO should be individually examined by the court before they are so designated. Under such an approach the first step would inevitably have to be that some limited form of disclosure be afforded to the opposing party. The court would then have to decide on the basis of submissions and evidence from each side whether the document justified AEO or required more liberal disclosure. There is no difference in substance between that approach, and the approach where the disclosing party can initially designate documents AEO, subject to the receiving party's ability to challenge the designation, provided that the disclosing party does not unfairly seek to take advantage of the opportunity. To the extent that Henry Carr J was outlawing the approach adopted in this case, I respectfully disagree. There was in any event, as I have said, no appeal from Mann J's order. 37. In Infederation Roth J added the observation (see [41]) that confidentiality rings were sometimes established in competition cases to prevent leakage in both directions of confidential information. Sharing of pricing information can of course contravene competition law, and the court ought not to facilitate it by means of the disclosure process unless it is impossible not to do so. His review of the authorities concluded at [42]: "