A former Epsom College student who conned a court into believing he was a doctor attending an emergency call to get off a speeding fine was jailed for a year on Monday.

Doctor's son Omid Mohammed Chiang, 26, a medical salesman who has no medical qualifications, wept as Judge John Boggis imposed the sentence at Southampton Crown Court.

The judge said Chiang had shown "breathtaking nerve" in getting off the speeding fine and then brazenly claiming £1,600 costs from the court to cover the "completely fabricated" salary of a non-existent locum doctor for the day he was at court to plead his case.

He said: "This deception of yours was practised, it was repeated, it was maintained."

At an earlier hearing Chiang, 26, of Brighton, admitted perverting the course of justice and attempted deception.

Previously, he had been given an absolute discharge and had his costs awarded, when he appeared at Southampton Magistrates' Court for the speed camera offence in March last year.

James Kellam, prosecuting, said that Chiang was caught doing 38mph in a 30mph zone in Southampton, but he immediately wrote to the police asking for an exemption and started the letter with: "I am a medical general practitioner."

He told the district judge at Southampton Magistrates' Court in December last year he was travelling back to Brighton to attend a sick child and produced a fake letter from the mother.

The court heard that the former public schoolboy, who boarded at Epsom College, had a father, who is a GP.

He had started a medical training course at Imperial College in 1999, but dropped out because he could not stand the sight of blood.

The photograph of the speeding offence showed Chiang's car with a green flashing light on the roof, the hearing was told.

When he was arrested police found a "doctor on call" sign inside the vehicle, a defibrillator, and a high visibility jacket with "doctor" written on it.

The badly spelt letter asking for the locum costs had made the authorities suspicious. When he was arrested, Chiang immediately admitted what he had done.

In mitigation, Simon Channon said that Chiang had never practised as a doctor.

He told the court that Chiang had seen a psychiatrist, who had made an initial diagnosis of an excessive compulsive disorder and a condition called pseudologia fantastica, which made him a pathological liar.