4 HASSAN v. THE UNITED KINGDOM – JUDGMENT United Kingdom authorities failed to carry out an investigation into the circumstances of the detention, ill-treatment and death. 4. The application was allocated to the Fourth Section of the Court (Rule 52 § 1 of the Rules of Court). Its examination of the application was adjourned pending adoption of the judgment in Al-Skeini and Others v. the United Kingdom [GC], no. 55721/07, ECHR 2011. Subsequently, on 30 August 2011, the application was communicated to the Government. 5. On 4 June 2013 the Chamber decided to relinquish jurisdiction to the Grand Chamber. The composition of the Grand Chamber was determined according to the provisions of Article 27 §§ 2 and 3 of the Convention and Rule 24 of the Rules of Court. 6. The applicants and the Government each filed further written pleadings on the admissibility and merits and third-party comments were received from Professor Françoise Hampson and Professor Noam Lubell, of the Human Rights Centre, University of Essex (“the Third Party”). 7. A hearing took place in public in the Human Rights Building, Strasbourg, on 11 December 2013 (Rule 59 § 3). There appeared before the Court: (a) for the Government Ms R. TOMLINSON, Mr J. EADIE QC, Mr C. STAKER, Mr M. ADDISON, Ms A. MCLEOD, Agent, Counsel, Advisers; (b) for the applicant Mr T. OTTY QC, Mr T. CLEAVER, Counsel, Mr P. SHINER, Ms B. SHINER, Ms L. SHINER, Advisers. The Court heard addresses by Mr Eadie and Mr Otty and their answers to questions put by the Court. THE FACTS I. THE CIRCUMSTANCES OF THE CASE 8. The facts of the case, as submitted by the parties, may be summarised as follows. Where certain facts are in dispute, each party’s version of events is set out.