Surrey Police are liaising with colleagues from Kent where Michael Wheatley disappeared at the weekend. The building society is 5 miles from Twickenham, where police were investigating a reported sighting yesterday.
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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.