The BBC has obtained two confidential documents alleging police corruption by officers from the former Flying Squad.
The intelligence reports detail how officers were suspected of a conspiracy to kidnap and allegedly planned to hold a victim for a £50,000 ransom in the mid 1990s.
Sources claim the files were part of the mass shredding of documents at Scotland Yard in 2002.
The Metropolitan Police says it is confident it has intelligence on all the officers named in the reports.
BBC London’s Glen Campbell spoke to former former Metropolitan Police officer Brian Paddick and Alistair Morgan, whose brother Daniel, it is claimed, was planning to expose police corruption but was murdered in 1987. More details at