RB (Algeria) v Secretary of State for the Home Department [2009] UKHL 10
Appeals from the Special Immigration Appeals Commission (SIAC) are restricted to matters of law or irrationality. The SIAC is entitled to have regard to “closed material”, ie material not made available to the appellant or his advisers and to assurances given by their governments in concluding that appellants would not, if deported, face a real risk of inhuman treatment contrary to Art 3 of the European Convention on Human Rights or violation of the right to a fair trial under Art 6.