Peter Francis, a former undercover police officer turned whistleblower, says information he gathered was later passed to the "Consulting Association", the shadowy company funded by 40 major firms to help them blacklist potential union organisers.
Francis says that information he gathered while posing as a member of the Youth Against Racism in Europe group was passed onto the Consulting Association. Senior figures involved with the CA have admitted to a parliamentary committee investigating the issue that they had regular contact with the police.
To many, including many blacklisted workers themselves, direct state involvement has seemed almost undeniable from the start. Many say that the information contained in their CA files could only have been obtained from the police.
Dave Smith, of the Blacklist Support Group, said "Police investigating the police is never going to get to the truth. This smacks of a cover-up. Only a judge-led public inquiry will get to the facts of collusion between the state and the blacklisters."