Watch the report by Mel Barham on the day Phillip Sherriff's killer was jailed for at least 14 years.
His widow is now campaigning for glass bottles to be banned from pubs and clubs.
The judge jailed the graphics designer for a split second of madness in a club, which killed the father-of-two.
Both men had travelled to London for a Jessie J gig. Ashley Charles attacked Phillip Sherrif with a broken bottle after some jostling at the bar. The judge said the bottle was a lethal weapon and the victim was a decent man.
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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.