JURY members in the Jimmy Mizen murder trial have been told they must answer two questions when considering their verdict.

Summing up the prosecution's case in the trial of 19-year-old Jake Fahri, prosecutor Crispin Aylett told jurors they must decide whether the defendant was acting in self-defence and whether he intended to cause the teenager serious harm.

Jimmy was killed when a pyrex-type dish was thrown at him, cutting his throat, following a row at the Three Cooks Bakery in Lee on May 10 last year.

Mr Aylett said: "I suggest that Mr Fahri was not defending himself and that he was trying to cause serious harm. If you agree with me then this must qualify as murder.

"If you throw a glass at someone's head intending to cause serious harm and the glass causes serious injury - then you can't really complain if you are convicted of murder."

He added: "It will give you no pleasure to convict a person of murder - especially a 19-year-old boy - but if you decide the evidence proves he did murder Jimmy, then it is your duty to do just that."

Earlier the Old Bailey listened to Mr Aylett describe an incident in November 2005 where Fahri spat and slapped a young girl in a row over money.

The defendant had borrowed £20 from a friend but failed to pay it back, prompting the young girl to visit the defendant's mother asking for the cash.

But when Fahri found out he "lost his temper - spitting, slapping and kicking the legs from beneath the youngster" outside a cafe.

"He behaved in a quite disgusting way", said Mr Aylett. "He attacked her in a public place at 10.30 in the morning - does that sound familiar?"

Jake Fahri, aged 19, of Milborough Crescent, Lee, denies murder and says he was acting in self-defence.

The Old Bailey trial continues.