A woman and her partner have been jailed for killing a young couple whom they hit with their Jaguar at 113mph (181km/h) on the A1 in Lincolnshire.
Mark Crompton, 20, and Jodie Brown, 19, of Swinstead, Lincolnshire, were killed in the crash near Grantham in May 2007.
They were near their broken-down car when driver Mary Butres, 47, of Stamford, Lincolnshire, lost control.
Butres was jailed for nine years and John Nichols, 57, from Carlby, was jailed for five years.
They were both found guilty of two counts of causing death by dangerous driving.
The business partners, who also had a personal relationship, had been drinking at Nottingham Racecourse before the crash.
"It seems perfectly clear that the Jaguar was being driven at a grossly excessive speed"
Nichols had decided not to drive home because he was over the alcohol limit so let Butres drive his car, even though she had been drinking.
The court heard that Nichols, who owned the Jaguar and was the front-seat passenger, was convicted because he had failed to stop her from driving dangerously.
Their car hit the broken-down Ford Fiesta before ploughing into Mr Crompton, Ms Brown and her brother Nick Brown, while they were walking away from their car to phone for help.
The impact was so powerful all three were hurled onto the opposite carriageway of the road at Great Ponton.
Butres, a boss at BM Partnership, a food packaging firm in Ely, Cambridgeshire, was found to be one-and-a-half times over the legal alcohol limit and had two previous convictions for speeding, the court heard.
She was banned from driving for seven years and Nichols was banned for five years.
Recorder Greg Dickinson QC said: "For all the family members and relatives and close friends the loss has been devastating and it is a loss that will never go away."
He added: "It seems perfectly clear that the Jaguar was being driven at a grossly excessive speed."
The car was described as coming round the bend of the A1 like a "bullet", before hitting the couple and flinging them into the air.
Miss Brown's 36-year-old brother Nick was also hit by the Jaguar and was left needing eight operations after breaking several bones in the collision.
During their trial, Butres and Nichols arrived each day with their own private security guards.
The court heard that Nichols lived in a £1.25m country house and owned shares worth £1.5m.
He was ordered to pay half the prosecution's costs of £14,000.
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