page_title: David Shayler
hierarchical_section_title: David Shayler
caption_attribution_description: English: British journalist and former MI5 (British Security Service) officer David Shayler at the 2005 Axis for Peace conference. Français&#160;: David Shayler, ancien officier du contre-espionnage britanniqu, à la conférence Axis for Peace 2005.
context_page_description: David Shayler is a former British MI5 officer and whistle-blower. Shayler was prosecuted under the Official Secrets Act 1989 for passing secret documents to The Mail on Sunday in August 1997 that alleged that MI5 was paranoid about socialists, and that it had previously investigated Labour Party ministers Peter Mandelson, Jack Straw and Harriet Harman.
context_section_description: David Shayler (/ˈʃeɪlər/; born 24 December 1965) is a former British MI5 officer and whistle-blower. Shayler was prosecuted under the Official Secrets Act 1989 for passing secret documents to The Mail on Sunday in August 1997 that alleged that MI5 was paranoid about socialists, and that it had previously investigated Labour Party ministers Peter Mandelson, Jack Straw and Harriet Harman.
caption: David Shayler at the 2005 Axis for Peace conference
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