She started having lessons with Ian in May, when she was 17. Both parties agree the sexual relationship started in August, a few days after Hannah's 18th birthday.

"We'd be out on a lesson and he'd tell me to drive to Bow Brickhill woods or Woburn Golf Course and then we'd have sex in the car. It happened between 10 and 15 times," said Hannah.

The company, which says it is appalled at the story, is now seeking advice from the Driving Standards Agency – who issued his licence – about any action they can take.

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