For years some of the biggest names in British business subscribed to a secret blacklist containing thousands of names with the power to deny work and destroy livelihoods. From the Millennium Dome to the iconic Olympic Park, some construction firms paid for information on workers they feared could delay work and cost them money. Reporter Richard Bilton does the first television interview with the bookkeeper for the organisation which ran the list. And he discovers that even though the list has now been closed down, blacklisting still appears to be alive and well in Britain.