A father has been killed during a family school run after the car he was driving veered into a river - moments before the same thing happened to his wife.
David Cox, 42, was driving his 11-year-old daughter to school along a bridle path near to the Monsal Trail, north of the A6, when the Toyota Aygo plunged into the River Wye.
His wife, Ruth, was driving their nine-year-old son in another car behind him which also slewed into the water.
Derbyshire Police said the two children and their 39-year-old mother managed to escape unhurt from the cars and swim to safety but the father could not be saved, despite attempts from local residents, and died a short time later.
Paul Hawker, station manager at Derbyshire Fire and Rescue Service, was one of the first on the scene and said the wintry weather in the area was a contributing factor in the accident, a fire service spokeswoman said.
Both mother and father were taking their children to school when the tragedy happened just after 8.30am.
Neighbours waded into the river to try to help the man and when police arrived on the scene an officer also plunged into the water to try to aid the rescue attempt.
Victoria Bamber, 32, said the man's son came running down the country lane shouting for help.
She said: "He came banging on the door saying 'There's been an accident, Daddy is trapped'. When I got to the scene, I could only see the silver 4x4 upside down in the water and Ruth was desperately trying to find David."
Emergency vehicles and personnel, local mountain rescue volunteers, land ambulances, and the air ambulance, attended to take all four passengers to hospital.
Police said the man later died at Stepping Hill Hospital.
Mr Cox worked for the BBC as part of the Future Media team in Salford.
Tim Davie, the corporation's acting director general, said: "We are very sad to learn of David's tragic death.
"He was a popular member of the Future Media team in Salford and had been key to the success of the red button service during the Olympics in the summer.
"Our thoughts are with his family, friends and colleagues here at the BBC at this difficult time."
Deaths linked to the recent cold snap have now hit double figures and forecasters are predicting more heavy snow before a thaw at the weekend.
The Met Office said it has amber warnings in place for much of Scotland, the north of England, east of England and East and West Midlands, with yellow warnings in Wales, southwest England and London and the South East.