These are my reasons for deciding, after a hearing on 24 January 2024, to make a declaration pursuant to s. 6(1) of the Justice and Security Act 2013 that these are proceedings in which a closed material application may be made (“a s. 6 declaration”).

Since the decision, the defendants have made a closed material application and also applied for summary judgment pursuant to CPR Part 24. The claimant has applied to join Lord Darroch of Kew as third defendant. I have given directions for the determination of these applications.

Andrew Hale-Byrne was a civil servant. He worked for the Ministry of Defence from 2001 to 2009 and then for the Department for International Trade from 2017 to 2021. On 13 October 2020, when he was recovering from cancer surgery, an armed team from the Metropolitan Police forcibly entered and searched his home and arrested him on suspicion of making a damaging disclosure of information in his possession by virtue of his position as a Crown servant (contrary to s. 3 of the Official Secrets Act 1989) and misconduct in public office (a common law offence). He was questioned in relation to these offences, but never charged.

These proceedings do not concern the way in which the arrest was effected, about which Mr Hale-Byrne has separate complaints. Nor do they concern the means by which the police and/or other agencies obtained the information which led to it. There is a complaint and claim before the Investigatory Powers Tribunal about these matters. I informed the parties that I am one of the members of the Tribunal dealing with that complaint and claim. No objection was taken to my dealing also with the present application.

The present claim, issued on 11 November 2022, is brought against the Secretaries of State responsible for the then Departments of International Trade (where Mr Hale-Byrne worked) and Foreign, Commonwealth and Development Office. In his Particulars of Claim, Mr Hale-Byrne says that named officials from these departments acted in bad faith by falsely identifying him to police as the source of diplomatic telegrams which had been leaked to Steven Edginton, a freelance journalist working for The Sun. The telegrams were from Sir Kim Darroch (now Lord Darroch), who was HM Ambassador to the United States of America. The publication of these telegrams precipitated his resignation. Mr Hale-Byrne says that the officials falsely identified Mr Hale-Byrne to the police, and then informed the press of his arrest, in order to create a distraction from adverse reporting about the conduct of Sir Kim, whom Mr Hale-Byrne accuses of misconduct endangering national security.

This course of conduct on the part of officials is said to give rise to claims against the defendant Secretaries of State for misfeasance in public office, breach of Mr Hale-Byrne’s rights under Articles 3, 8 and 18 ECHR and unlawful processing of personal data contrary to Article 5 of the General Data Protection Regulation (“GDPR”).

The court may make a s. 6 declaration if it considers that two conditions are met. The first (s. 6(4)) is that:

“(a)

a party to the proceedings would be required to disclose sensitive material in the course of the proceedings to another person (whether or not another party to the proceedings), or

(b)

a party to the proceedings would be required to make such a disclosure were it not for one or more of the following—

(i)

the possibility of a claim for public interest immunity in relation to the material,

(ii)

the fact that there would be no requirement to disclose if the party chose not to rely on the material,

(iii)

s.56(1) of the Investigatory Powers Act 2016 (exclusion for intercept material),

(iv)

any other enactment that would prevent the party from disclosing the material but would not do so if the proceedings were proceedings in relation to which there was a declaration under this section.”

It is sufficient if the first condition is met in relation to one issue in the case and by reference to some sensitive material relevant to that issue: Belhaj v Straw [2017] EWHC 1861 (QB), [22] and [37] and the case law cited there. The court should respect the Secretary of State’s assessment that disclosure of sensitive material will cause damage to national security, save to the extent that it is vitiated by public law error: R (Begum) v Special Immigration Appeals Commission [2021] AC 765, [70].

The second condition (s. 6(5)) is that it is in the interests of the fair and effective administration of justice in the proceedings to make a declaration.

Section 6(7) provides that the court may not make a s. 6 declaration on the application of the Secretary of State unless satisfied that, before making the application, he has considered whether to make, or advise another person to make, a claim for public interest immunity (PII).

As to this, it should be borne in mind that, in a case where the central issue turns on evidence in respect of which a PII application would be likely to be successful, the claim may fall to be struck out applying the principles in Carnduff v Rock [2001] 1 WLR 1786. This could result in a grave injustice to the claimant. It follows that the seriousness of the underlying allegations may, in an appropriate case, be a reason in favour of a CMP, rather than a reason against one: see Belhaj, [28].

Sensitive material is defined in s. 6(11) as material the disclosure of which would be damaging to the interests of national security.

Paul Diamond for the claimant submitted in his skeleton argument that a closed material procedure (CMP) represents a derogation from common law standards of fairness and should only be permitted where there is no viable alternative. In this case, it was said that the application for a s. 6 declaration was being used for the improper purpose of protecting a former ambassador from embarrassment. This, Mr Diamond submitted, was “the United Kingdom’s Dreyfus case”.

At para. 19 of his skeleton argument, Mr Diamond submitted as follows:

“The ‘evidence’ to be presented to the learned judge in any Closed part of this hearing is likely to have been obtained by bugging, the accessing of electronic equipment and the monitoring of the Claimant. This ‘evidence’ was most likely obtained by unlawful means and by a misuse of the security services; and for wholly political purposes. The Claimant has now raised a claim against the security services at the Investigatory Powers Tribunal.”

Mr Diamond also submitted in writing that this was not a national security case and there was no good reason why it should not be heard in OPEN. However, by the end of the hearing, his submissions had softened somewhat. The key point was that the court should bear in mind the need to test the propriety of the defendants’ reasons for informing the police that Mr Hale-Byrne was responsible for leaking the telegrams; and, having considered the CLOSED material supporting the application, the court should adopt whatever procedure would be best suited to achieving that objective.

Adam Heppinstall KC for the defendants submitted that condition one is satisfied here because the defendants would be required to disclose sensitive material. The CLOSED bundle for the s. 6 application contained a selection of representative examples of the types of sensitive material which would fall to be disclosed.

Condition two is satisfied because the material will be relevant to the issue – in particular, the reasons for the claimant’s arrest; and it would not be possible to determine these claims on the basis of OPEN material alone.

The Special Advocates, Stephen Cragg KC and David Lemer, filed a short CLOSED skeleton argument, which with the agreement of the Secretaries of State was disclosed into OPEN. It indicated that the Special Advocates did not oppose the s. 6 application in CLOSED.

I can express my reasons for concluding that a s. 6 declaration is appropriate in this case briefly and entirely in OPEN: