A teenage knifeman who was part of a gang which attacked a 13-year-old moviegoer as he waited for a lift home has been locked up for 30 months.

The young victim, who cannot be identified for legal reasons, had been left alone by his friends as he waited for his father to turn up, but he was suddenly surrounded by a group of about six older boys as he sat on a bench.

Prosecutor Simon Jack told Bradford Crown Court that the slightly-built youngster refused to hand over his mobile phone and also said he had no money.

But 19-year-old Ismail Khan, who had sat down next to him, produced a knife with a four-inch-long blade and forced the terrified boy to hand over his wallet.

Khan took £2 from the wallet and then told the boy if he did not hand over his phone in ten seconds he would get "mashed up''.

When he had counted down Khan punched the boy in the face while one of the other youths also struck him from behind. Mr Jack said Khan then tried to headbutt the youngster, but he managed to lower his head to avoid the blow hitting his face. The group jumped on the boy and he was held down while his phone was taken from a zipped-up pocket.

The gang fled along Vicar Lane following the robbery in May and the boy's father arrived to find him in a distressed state with swelling and bruising to his face. But Mr Jack said CCTV footage of the incident was viewed by an officer and Khan was recognised.

He was arrested in April and maintained his denials even after he had been picked out by the boy during identification procedures. Khan, of Lindley Road, Little Horton, Bradford, finally pleaded guilty to the robbery last month, but it was not until yesterday that he accepted using a knife at the time of the offence.

His barrister, Nikki Peers, said he had fallen in with the wrong crowd and he now expressed shame and remorse for what he had done.

The court heard that at the time of the robbery Khan was already the subject of a conditional discharge for 18 months following an offence of common assault.