"My grounds for appeal have been classified "Secret" under the Official Secrets Act and I am not yet able to provide details."
"1. As she was not able to look at the majority of the documents because of the Respondent's contention that they were protected by public interest certificates, the Chair was inclined to give the Appellant the benefit of the doubt in relation to their relevance and assumed that the majority were relevant to the present proceedings.
"I would therefore propose that the House ought now to decide that courts have and are entitled to exercise a power and duty to hold a balance between the public interest, as expressed by a Minister, to withhold certain documents or other evidence, and the public interest in ensuring the proper administration of justice. That does not mean that a court would reject a Minister's view: full weight must be given to it in every case, and if the Minister's reasons are of a character which judicial experience is not competent to weigh, then the Minister's view must prevail. But experience has shown that reasons given for withholding whole classes of documents are often not of that character. For example a court is perfectly well able to assess the likelihood that, if the writer of a certain class of document knew that there was a chance that his report might be produced in legal proceedings, he would make a less full and candid report than he would otherwise have done.
"Though this case requires an answer to be given to the question whether in the last resort decision rests with the courts or with a Minister, I see no reason to envisage friction or tension as between the courts and the executive. They both operate in the public interest. Some aspects of the public interest are chiefly within the knowledge of some Minister and can best be assessed by him. I see no reason to fear that the courts would not in regard to them be fully and readily receptive to all representations made in appropriate form and with reasonable sufficiency. If a responsible Minister stated that production of a document would jeopardise public safety it is inconceivable that any court would make an order for its production. The desirability of refusing production would heavily outweigh the desirability of requiring it."
"I accept the primary submission of Mr Stephen Richards on behalf of the Secretary of State that the courts have thus acknowledged that where the Crown having the sole or predominant responsibility for the security of the State, asserts by evidence that a particular course of action was or is necessary for the safeguarding of national security, the assertion will be accepted for the courts are in no position themselves to decide such a question by the ordinary rules of adjudication; and the interests of security will prevail over the interest of the parties to private litigation even if it will have a decisive outcome on the private litigation."
"......the decision on whether the requirements of national security outweigh the duty of fairness in any particular case is for the Government and not for the courts; the Government alone has access to the necessary information and in any event the judicial process is unsuitable for reaching decisions on national security."
"I am satisfied that the work of all the security forces identified by the Secretary of State requires secrecy if it is to be effective. I am further satisfied that the disclosure of, or evidence about, the identity of members of the special units could substantially impair their capability to perform the tasks assigned to them and could put their lives at risk. The disclosure of information about the organisation, methods of operation, procedures and capabilities of the special units could also substantially impair their operational efficiency. In particular any disclosure of these matters would be of value to terrorist organisations and would substantially impair the protection which these units give to the community in Northern Ireland against terrorist attack. I am further satisfied that the Secretary of State's grave concern is well founded. The protection of the lives and safety of those involved and of their families and of persons who have provided or may provide information and intelligence to the security services is clearly of paramount importance. If the terrorists are able to discover the identities of security personnel or the identities or existence of informants such personnel or informants are then put in serious personal danger and their capacity to perform their tasks or willingness to provide information is reduced or eliminated. I take judicial notice that past experience in the Province has proved this to be only too true. I conclude therefore that the disclosure of any such information by its nature belongs to a class of information which ought not in the public interest to be disclosed for the reasons to which I have made reference."
"My lords, I do think it would be possible to state a test in a form which could be applied in all cases. Circumstances vary greatly. The weight of the public interest against disclosure will vary according to the nature of the particular documents in question; for example it will in general be stronger where the documents are Cabinet papers than when they are at a lower level. The weight of the public interest in favour of disclosure will vary even more widely because it depends upon the probable evidential value to the party seeking disclosure of the particular documents, in almost infinitely variable circumstances of individual cases. The most that can usefully be said is that, in order to persuade the court even to inspect documents for which public interest immunity is claimed, the party seeking disclosure ought at least to satisfy the court that the documents are very likely to contain material which would give substantial support to his contention on an issue which arises in the case, and that without them he might be "deprived of the means of . . . . proper presentation" of his case: see Glasgow Corporation v. Central Land Board, 1956 S.C.(H.L) 1, 18 per Lord Radcliffe."
"I have already indicated that on my reading of the authorities I am not permitted to carry out a balancing exercise once interests of national security arise and there is evidence to support the Secretary of State's claim."
"The public interest may require that relevant documents ought not to be produced. If, for example, national security would or might be imperilled by the production and consequent disclosure of certain documents, then the interest of a litigant must give way."