An Investigation into Secrecy Workers have taken jobs in a London factory without first being told they could be working with a killer substance. Over 100 died in 12 years-the youngest was 32. In law they had no right to know potential risks. Yorkshire's rivers are the worst in the country but the identity of the polluters has been kept secret. ' The law protects the polluter not the public' claims the Yorkshire River Authority. Some local authorities say undue secrecy at the Department of the Environment hinders their efforts to improve the environment. As a recent Royal Commission demands a more open policy this film investigates specific cases of secrecy and asks should there be a ' right to know '? Written by Jeremy HORNSBY Producer MICHAEL BARNES