42 A. AND OTHERS v. THE UNITED KINGDOM JUDGMENT thus prevent the development of more serious conduct. They were also designed to be easier to prove. G. Consideration of the use of special advocates under the Prevention of Terrorism Act 2005 96. On 31 October 2007 the House of Lords gave judgment in Secretary of State for the Home Department (Respondent) v. MB (FC) (Appellant) [2007] UKHL 46, which concerned a challenge to a non-derogating control order made by the Secretary of State under sections 2 and 3(1)(a) of the Prevention of Terrorism Act 2005. The House of Lords had to decide, inter alia, whether procedures provided for by section 3 of the 2005 Act, involving closed hearings and special advocates, were compatible with Article 6 of the Convention, given that, in the case of one of the appellants, they had resulted in the case against him being in its essence entirely undisclosed, with no specific allegation of terrorism-related activity being contained in open material. The House of Lords was unanimous in holding that the proceedings in question determined civil rights and obligations and thus attracted the protection of Article 6. On the question of compliance, the majority (Baroness Hale, Lord Carswell and Lord Brown) held that although in many cases the special-advocate procedure would provide a sufficient counterbalance where the Secretary of State wished to withhold material upon which she wished to rely in order to establish the existence of reasonable grounds for suspecting that the controlee was or had been involved in terrorism-related activity, each case had to be considered individually. Baroness Hale put it as follows: “65. ... It would all depend upon the nature of the case; what steps had been taken to explain the detail of the allegations to the controlled person so that he could anticipate what the material in support might be; what steps had been taken to summarise the closed material in support without revealing names, dates or places; the nature and content of the material withheld; how effectively the special advocate had been able to challenge it on behalf of the controlled person; and what difference its disclosure might have made. All of these factors would be relevant to whether the controlled person had been ‘given a meaningful opportunity to contest the factual basis’ for the order. 66. I do not think that we can be confident that Strasbourg would hold that every control order hearing in which the special-advocate procedure had been used, as contemplated by the 2005 Act and Part 76 of the Civil Procedure Rules, would be sufficient to comply with Article 6. However, with strenuous efforts from all, difficult and time-consuming though it will be, it should usually be possible to accord the controlled person ‘a substantial measure of procedural justice’. Everyone involved will have to do their best to ensure that the ‘principles of judicial inquiry’ are complied with to the fullest extent possible. The Secretary of State must give as full as possible an explanation of why she considers that the grounds in section 2(1) are made out. The fuller the explanation given, the fuller the instructions that the special