Freed detectives Robert Clark and Christopher Drury sue Met Police

A pair of detectives jailed for a drug conspiracy - but cleared on appeal - have launched a bid for compensation from the Metropolitan Police.

Robert Clark and Christopher Drury, both 50, served prison sentences after being jailed at the Old Bailey on the word of supergrasses.

The Crown Prosecution Service dropped its case before the pair's re-trial.

Both denied conspiracy to supply class B drugs and perverting the course of justice.

Mr Clark and Mr Drury's solicitors said: "Mr Clark and Mr Drury have had their careers ruined by these allegations."

"They will now be looking for appropriate compensation and damages.

"Above all, they call for a thorough inquiry into how the prosecution has been permitted to rely on such discredited and tainted evidence in their own and other trials."

Clark and Drury were jailed for 10 and eight years respectively.

They were alleged to have been corrupt Metropolitan Police officers involved in drug dealing.

The case hung on the testimony of Evelyn Fleckney, who became a supergrass after her 15-year sentenced was reduced.

A corrupt detective, Neil Putnam, also turned supergrass to testify against the pair.

But Fleckney retracted her evidence on release from custody.

The solicitors argue she only gave evidence originally under inducement.

Mark Ellison, QC, for the Crown, said: "We consider that without Fleckney's willing evidence in this case, there is no longer a realistic prospect of conviction and it is our decision to offer no evidence against them."

The pair currently work as bus drivers in the north of England.