A pervert who unzipped women's trousers on Tube trains has been jailed for three years.

Bernardo Da Conceicao, 35, of Percival Road, Enfield, assaulted seven women between 2003 and 2005, using a satchel to cover his hand.

The trainee accountant, who was a student at London Metropolitan University, targeted women travelling on the Underground during rush hours.

He would strike on the southbound Victoria Line between Finsbury Park and Highbury and Islington stations and on the northbound Piccadilly line in the evening.

His victims felt a light pressure on their groin, before glancing down to see Da Conceicao undoing their zips.

He was caught last May after a 33-year-old woman, who was approached by Da Conceicao at Highbury and Islington station, raised the alarm.

Da Conceicao was sentenced at Middlesex Crown Court on Wednesday, after being found guilty of three counts of indecent assault and four counts of sexual assault.

He will also be placed on the Sex Offenders' Register.

DC Jane Hill of the British Transport Police said: "We are very pleased with the outcome of this trial.

"A custodial sentence is highly appropriate in this case and sends a powerful message to potential offenders that behaviour of this kind will not be tolerated.

"We hope Da Conceicao's victims will take comfort in knowing the seriousness of his offences have been acknowledged by the court and that he will be going to prison for three years."

In a separate action, British Transport Police are seeking an Anti-Social Behaviour order to ban Da Conceicao from the Underground following his release from prison.