Most importantly, the games went off without a single major security incident, quelling fears that began the day after London won the right to stage the games, when the July 7, 2005 terrorist attacks killed 56 and injured more than 700.

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"All of the imams that I have spoken to after 7 July have condemned the attacks and that is what they are preaching in prison, " he told BBC Radio 4's Today programme.

BBC: NEWS | UK | Do prisons radicalise inmates?

It was a few days after the London bomb attacks on 7 July 2005 and Mr Russell was classed as missing.

BBC: Obituary: Philip Russell

Suspected hacking victims include some of the world's biggest celebrities, including Angelina Jolie, Brad Pitt, Jude Law, Paul McCartney and soccer star Wayne Rooney, as well as victims of crime and the July 7, 2005, London terrorist attacks.

CNN: Trial date set for Brooks, Coulson in phone hacking case

The challenge of securing the Games was made clear the day after the U.K. won its Olympic bid: On July 7, 2005, a series of coordinated suicide bomb attacks in London killed 56 people and injured more than 700.

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Friends say Mr Menezes was as shocked as all Londoners by the 7 July tube and bus bombings, as well as the attempted London public transport attacks on Thursday 21 July - the day before he was shot.

BBC: Profile: Jean Charles de Menezes