Human rights — Prohibition of torture and inhuman or degrading treatment or punishment — United States of America seeking extradition of applicants from United Kingdom — Applicants indicted in United States on terrorism charges — Applicants lodging application against United Kingdom with European Court of Human Rights — Admissibility of applicants’ complaints — Whether applicants at real risk of ill-treatment if extradited and convicted in United States — Whether United Kingdom would be in violation of Article 3 of European Convention on Human Rights, 1950 if applicants extradited to United States — Prison conditions at super-maximum security detention facility in United States — Whether meeting Article 3 requirements — Solitary confinement — Outdoor exercise — Mental health of detainee — Special administrative measures — Length of possible sentences — Whether sentences grossly disproportionate — Whether sentences amounting to ill-treatment contrary to Article 3 — European Convention on Human Rights, 1950, Article 3

Treaties — Interpretation — European Convention on Human Rights, 1950, Article 3 — Prohibition of torture and inhuman or degrading treatment or punishment — Relevant international law on non-refoulement — Approach of Human Rights Committee — Article 7 of International Covenant on Civil and Political Rights, 1966 — Article 19 of Charter on Fundamental Rights of the European Union — Council of Europe Guidelines — Articles 3 and 16(2) of United Nations Convention against Torture, 1984

Extradition — 1972 United Kingdom–United States Extradition Treaty superseded by 2003 Treaty — United States of America seeking extradition of applicants from United Kingdom — Applicants contesting proposed extradition in English courts — Applicants lodging application against United Kingdom with European Court of Human Rights — Whether applicants at real risk of ill-treatment if extradited and convicted in United States — Whether United Kingdom would be in violation of Article 3 of European Convention on Human Rights, 1950 if applicants extradited to United States