Paul Hawker, Station Manager at Buxton Fire Station, says people battled in vain to save the driver whose car plunged into the icy river.
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Police have confirmed a 26-year-old man from Cornwall has died at the campsite area of the Cheshire festival.
The AA have warned of traffic jams and urged people to carry extra water in their vehicles because of the warm weather.
Hundreds of free sporting events took place across the region to mark I Am Team GB.