He was a former pupil of Paget-Lewis at Homerton House School, and was wounded in the shooting which led to the death of his father.
[4] The applicants' complaints were directed at the failure of the authorities to appreciate and act on what they claim was a series of clear warning signs that Paget-Lewis represented a serious threat to the physical safety of Ahmet Osman and his family.
The applicants argued that the police had been given information which should have made it clear that the individual posed a danger.
The English courts all agreed that the police owed no duty of care to the applicants, confirming the law in Hill v Chief Constable of West Yorkshire where it was ruled that the police owed no duty of care to one of the victims of the Yorkshire Ripper.
[6] The aim of this test is to interpret the positive obligations under the Convention in such a way that they do "not impose an impossible or disproportionate burden on the authorities".