Newcastle University's Conor O'Neill, who carried out research into the effects of a bomb blast inside a train carriage, said using special materials could prevent shrapnel injuring passengers.
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The 34-year-old from Coulsdon in Surrey died during the private party in Headley in the early hours of Monday, Surrey Police said.
The Home Office made the arrests at various restaurants across London on July 4.
Mayor of Newham Sir Robin Wales criticised the International Olympic Committee on the fourth anniversary of the opening ceremony.