An update from the Maritime and Coastguard Agency says that 10 people have been injured, and that most are showing signs of hypothermia.
The statement continued: "It's believed that all those in the water have been accounted for. However rescue units on scene, including the helicopters and lifeboats, are carrying out further searches to make sure."
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After a relatively mild and quiet night, an episode of rain for many of us tomorrow.
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.