“In Al Rawi & Ors v The Security Service & Ors [2011] UKSC 34; [2012] 1 AC 531 the claimants (respondents in the Supreme Court) were bringing civil claims for damages against the defendants (appellants in the Supreme Court) alleging complicity by the defendants in their mistreatment by foreign powers (including detention at Guantanamo Bay). The defendants as part of their defence wished to place before the court ‘security sensitive material’ – presumably the evidence of intelligence agents, or similar, denying the complicity – which for security reasons could not be disclosed to the claimants. Thus the defendants submitted that the court hold a “closed material procedure”. They envisaged that the evidence would be placed before the courts in closed session, i.e. a session from which the claimants and their representatives (and the public) were excluded. In the closed session the claimants would be represented by “special advocates” appointed by the court who would have access to the evidence but would not be able to take instructions from the claimants. Such procedures are controversial since they threaten the fundamental principles of open justice and natural justice. On the other hand, the national interest would doubtless be impaired, in some cases, if intelligence agents gave evidence and their methods and secrets were exposed in open court.”
UK Constitutional Law Group, 29th July 2013
Source: www.ukconstitutionallaw.org