A suspect has been named in the case of WPC Yvonne Fletcher, who was fatally shot outside the Libyan Embassy in London 27 years ago.

The Daily Telegraph claims to have seen a 140-page secret review of evidence which was conducted at the request of the Metropolitan Police by a senior Canadian prosecutor.

The report contains evidence from David Robertson, a painter and decorator.

He claims to have seen Abulmagid Salah Almeri firing a machine gun from a window at the embassy during a protest outside the building in St James's Square in April 1984.

The suspect was working as a junior diplomat.

Mr Robertson said he saw at least three other men standing with Almeri when he opened fire.

Scotland Yard has kept the case open and is planning to send officers to Libya in the wake of the collapse of Colonel Muammar Gaddafi's regime, in the hope of bringing the killer to justice.

WPC Fletcher, who was 25, was killed by a single bullet that hit her in the abdomen. There followed an 11-day armed siege which ended with 30 Libyan nationals being deported.

The Met believes Almeri may have died, although there may be a pretence by Libyan officials to prevent him being arrested.

The CPS report claims there is sufficient evidence to prosecute two other Libyans for conspiracy to cause Yvonne Fletcher's death.

A few days ago Queenie Fletcher, WPC Fletcher's mother, said Col Gaddafi's overthrow offered "the best chance yet" of justice for her daughter.