Police National Computer: Data Protection Mr. Stephen O'Brien To ask the Secretary of State for the Home Department what mechanisms are in place to detect careless and abusive disclosures from the Police National Computer. Mr. McNulty The detection and prevention of unlawful disclosure from the Police National Computer (PNC) is a matter for individual police forces and other criminal justice agencies with access to PNC data. All organisations with access to PNC data are bound by the Data Protection Act 1998; controls specified in the Risk Management Accreditation Document Set for the PNC; and their own internal security procedures.