A medical salesman who dodged a speeding fine - saying he was a doctor on an emergency call - has been jailed.
Mohammed Chiang, 26, a GP's son from Brighton, dropped out of medical training because he could not stand the sight of blood.
Jailing him for a year, Judge John Boggis told Southampton Crown Court Chiang had shown "breathtaking nerve".
Chiang, who grew up in Surrey, had earlier admitted perverting the course of justice and attempted deception.
The court heard he had been given an absolute discharge by Southampton magistrates after pleading not guilty to speeding in the city last December.
He asked for the fact that he was a doctor on an urgent call to be taken into account as mitigating circumstances.
But staff at the Safer Roads Partnership investigation team in Hampshire became suspicious when he applied for £1,600 costs to cover a fake locum for the day he was before the magistrates.
The judge was told on Monday that Chiang, a former boarder at Epsom College, told people he was a doctor to boost his status in medical sales.
His counsel, Simon Channon, said a psychiatrist had made an initial diagnosis of obsessive compulsive disorder and a condition called pseudologia fantastica, which made him a pathological liar.
He said Chiang, who has a banking degree, had gambling problems and was made bankrupt in 2005.
He said he was petrified of going to prison and had attempted suicide twice.
His parents had split up and his mother, who was in court, had purchased a lease for a coffee shop in Liverpool which Chiang had renovated and wanted to run.