A teenage thug with a history of offending has been locked up for four years for a violent street robbery in Bradford.

Scott Petty, 18, lured his victim into a side street where he was attacked and stripped of his mobile phone and gold bracelet.

Leeds Crown Court heard yesterday that Petty punched Daniel Smith in the face and tried to wrench his bracelet off while his accomplices rifled his pocket and snatched his phone.

Prosecutor Nigel Hamilton said the attack happened in Manchester Road, Bradford, at 2am on September 10, last year.

Mr Smith was set upon when he was walking home from the Craven Heifer pub towards Odsal Roundabout.

The court heard that Mr Smith was lured by Petty down a quiet street and set upon by the gang.

He was knocked to the floor and suffered injuries to his left eye and right wrist. He was robbed of the phone and bracelet, worth £400.

Petty was convicted of the offence by a jury at Bradford Crown Court three weeks ago.

Yesterday he asked for 19 other offences to be taken into consideration including house burglary and theft from cars.

The court heard that Petty was sent to custody for two months by Bradford Magistrates on February 5 after he admitted attempted trespass with intent to steal.

In January this year magistrates issued a anti-social behaviour order (ASBO) against Petty, banning him from parts of Bradford.

The order was sought by South Bradford Community Housing Trust which claimed that Petty, of Reginald Street, Marshfield, Bradford, had threatened other residents, damaged property and been involved with drinking and drug-taking in public.

Petty was barred from the Bankfoot area and part of Wibsey and prevented from associating with a group of named youths.

Jayne Beckett, mitigating for Petty, said his family were very disappointed in him. He had been fully co-operative with the police and was making an effort to sort his life out.

He had started to take drugs and had committed crimes to feed the habit.

Judge Jonathan Durham Hall, QC, said that Petty's victim Daniel Smith was "a thoroughly decent and hard working young man."

Petty had lured him to a quiet place and set about him, punching him repeatedly until he fell to the floor.

It was a serious and violent offence and a massive escalation of his previous offending. The Judge said the trial jury had no trouble convicting Petty of the robbery.

But he had since been very helpful to the police who had taken him on a tour so he could point out where he had committed other unsolved crimes.

The judge said Petty had the beginnings of a change of heart and so he had cut the sentence from the five years he was considering down to four.