HASSAN v. THE UNITED KINGDOM – JUDGMENT 35 arrival at the Camp, he was taken to the JFIT compound, which was entirely controlled by United Kingdom forces, and he remained there until 25 April. Even following his transfer from the JFIT compound, he remained under United Kingdom control, since the United Kingdom authorities continued to assume responsibility over the well-being of United Kingdom detainees in Camp Bucca; they liaised with the ICRC about their treatment and the notification of their detention to their families; retained full rights of access and had a resident monitoring team at Camp Bucca to ensure compliance with domestic and international standards. The United Kingdom Provost Staff (military police) had an overseeing responsibility for United Kingdom detainees, on whom they checked daily, and United Kingdom detainees requiring medical attention would be treated in United Kingdom field hospitals. The United Kingdom also remained responsible for classifying detainees under Articles 4 and 5 of the Third Geneva Convention. There was nothing to suggest that the United States authorities asserted any basis of their own for detaining Tarek Hassan. The evidence of Major Wilson was that decisions as to whether to release a United Kingdom detainee were made by the United Kingdom. In Tarek Hassan’s case, it was JFIT which recommended he be released. Moreover, if a decision was made by the United Kingdom authorities to release a detainee, he could not simply be released by the United States, but had to be processed out of the Camp by the United Kingdom. In the applicant’s view, it was clear that in guarding and escorting United Kingdom detainees at Camp Bucca, the United States were acting as agents for the United Kingdom. This was confirmed by the fact that the United Kingdom would reimburse the United States for the costs involved in maintaining detainees. Holding detainees at the United States base was simply a matter of United Kingdom operational convenience. The position was no different in substance from the United Kingdom contracting-out the duties of guarding their detainees to private contractors. The United Kingdom could not contract out of its responsibility under the Convention for detainees and could not absolve itself of responsibility by placing detainees in the temporary custody of another organisation. (b) The Government 70. The Government emphasised that, according to the Court’s case-law, the exercise of extra-territorial jurisdiction remained exceptional. Furthermore, the concept of jurisdiction was not subject to the “living instrument” doctrine. In Al-Skeini, cited above, the Court found that the United Kingdom had jurisdiction in relation to the deaths of the applicants’ relatives because of a combination of two fact-specific circumstances. The first key element was the fact that the United Kingdom had, from 1 May 2003 until 24 June 2004, assumed authority and responsibility for the maintenance of security in South East Iraq as an occupying power. The