The family of a taxi driver who died when part of a building collapsed onto her car says they "owe it to her" to find out what happened that night. 49-year-old Julie Sillitoe died when storms and high winds hit central London on 14 February.
Speaking to ITV News, her husband Steve Sillitoe said: "we don't live in a third world country, and buildings don't just collapse."
More top news
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.