A Land Rover boss who smashed his 4x4 into a car during a road rage chase, paralysing two young sisters, has been jailed for four-and-a-half years.
Katrina and Karlina Raiba, now aged eight and six, suffered spinal injuries in the crash on the A509 in Wellingborough, Northamptonshire.
Northampton Crown Court heard that Jaguar Land Rover manager Andrew Nay was "bullying" a woman driving a Mazda people carrier before the accident.
Footage played in court showed Nay, also a driving instructor, pulling right across a junction in his Land Rover Discovery into the path of the victims' Vauxhall Signum.
Karlina and Katrina Raiba, aged six and eight
Karlina and Katrina Raiba before the crash
He admitted four counts of causing serious injury by dangerous driving but denied chasing the Mazda before the crash in October last year.
Judge Adrienne Lucking QC said: "This was a prolonged, persistent and deliberate course of very bad driving.
"No sentence I can pass will ever feel like enough for this family."
Addressing Nay, she said: "You maintained an account that was incredible and inconsistent."
Andrew Nay says he 'hates himself' for what he has done
Nay was disqualified from driving for four years after his release from prison.
Karlina and Katrina's parents, Roberts Raibais and Renate Raiba, also suffered broken bones in the crash.
The court heard their lives had been changed "200%".
Speaking after the sentencing, the girls' father said he felt Nay should have been banned from driving for life.
He said: "It's good he was given this sentence and will go to prison, but it won't change what's happened or help my daughters to walk again.
Roberts Raibais (left) and Renate Raiba, parents of Katrina and Karlina
"I still don't think he realises the huge damage he has caused.
"I can't understand how a driving instructor could behave that way behind the wheel.
"It's not a game, this has nearly destroyed my family. There is no excuse."
Prosecutor Matthew Howcliffe said the family were required to move home to new accommodation adapted to their needs.
Marcus Kraehling-Smith, mitigating for Nay, of Harrier Close, Corby, said his client was "truly remorseful".
Reading a letter from 39-year-old Nay, Mr Kraehling-Smith said: "I am truly sorry for all the hurt, pain and devastation that I have caused to Mr Raibais, his wife and children.
"Never did I intend to cause the accident, to cause so much pain and upset. It upsets me greatly knowing that I have.
"I wake up knowing what I have done and hate myself. I wish I could change things.
"I know these words do nothing to help but I am truly sorry for everything."