§ Mr. Cohen
To ask the Secretary of State for the Home Department on what occasions certificates under section 27 of the Data Protection Act 1984 were signed by his Department; for how long each certificate was valid; what procedures apply when such certificates are signed; by what methods he is notified whenever a Cabinet Minister signs a certificate; and if he will make a statement. 
§ Mr. Sackville
I am aware of none as far as the Home Office is concerned. Disclosing details of such certificates would itself not be in the interest of national security.