A firefighter has died, while on a training course at an Olympic watersports venue in Hertfordshire.
Alan Soard, 38, was taken ill at the Lee Valley White Water Centre in Waltham Cross yesterday. He had been taking part in a water-rescue training course.
Three ambulances and two air ambulances were called, but attempts to resuscitate him failed.
Mr Soard had served for Suffolk Fire and Rescue Service.
Chief Fire Officer Andy Fry said:
"Our thoughts at this very sad time are with Alan's family and friends and also with his firefighter colleagues who were with Alan at the time he was taken ill.
"Everyone has been stunned by these events."
The fire service is working with Hertfordshire Police and the Health and Safety Executive to establish the full details of how Mr Soard died.
More top news
In a wide-ranging Peston on Sunday interview, he said Parliament security needs reviewing and the PM's counter-terror strategy is flawed.
The terror attack carried out by Khalid Masood at Westminster that left four people dead lasted less than two minutes say police.
Two knives were found at the scene in Islington, North London, and the suspects fled on foot before being arrested.