Barry George lost an earlier appeal against his conviction in 2002

The Court of Appeal has reserved judgement in this second appeal case.

George, 47, is serving life for shooting Miss Dando dead outside her Fulham, west London, home in 1999.

His lawyer contends that the conviction was unsafe because of new scientific doubt cast on gunshot discharge residue submitted as evidence.

The prosecution says it was just one component of a "compelling circumstantial case".

JILL DANDO MURDER CASE 26 April 1999 Jill Dando is shot dead in west London 25 May 2000 Barry George, also known as Barry Bulsara, is arrested 29 May 2000 George is charged with murder 2 July 2001 George is found guilty of murder and later sentenced to life in prison 29 July 2002 George loses an appeal against his "unsafe" conviction 16 Dec 2002 House of Lords refuses permission for further challenge 20 June 2007 The Criminal Cases Review Commission grants George the right to another appeal 7 November 2007 Judgement reserved on second appeal Background to case Jill Dando: TV's golden girl Profile: Barry George

The three-day hearing was George's second legal challenge over the July 2001 Old Bailey verdict.

He lost his first appeal a year later.

This latest hearing centred on the significance of a microscopic speck of firearm discharge found in George's coat following his arrest more than 12 months after the shooting.

William Clegg QC, for George, argued the firearm evidence carried "zero or neutral evidential weight" and if it was admitted again before a jury, it should have the proper weight attached.