www.mi5.gov.uk

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• name: description content: MI5's mission is to keep the country safe. For more than a century we have worked to protect the UK from a range of threats, whether it be from terrorism or hostile activity by states.
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• property: og:title content: Home | MI5 - The Security Service
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• property: twitter:title content: Home | MI5 - The Security Service
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• property: twitter:description content: MI5's mission is to keep the country safe. For more than a century we have worked to protect the UK from a range of threats, whether it be from terrorism or hostile activity by states.
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• Skip to Main Content
• Find out more about terrorism threat levels
• https://www.mi5.gov.uk/
• Open navigation menu
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• Centenary History
• http://www.mi5.gov.uk/about-us
• People
• Workforce information
• Director General
• Former Directors General
• Joint Terrorism Analysis Centre
• Joint State Threats Assessment Team
• National Protective Security Authority
• Where we work
• Thames House
• Partnerships
• Cinquefoil Trust
• Purpose and Values
• http://www.mi5.gov.uk/what-we-do
• Countering terrorism
• Countering state threats
• Protective security
• http://www.mi5.gov.uk/how-we-work
• Gathering intelligence
• Interception of communications
• Equipment interference
• Covert surveillance
• Covert Human Intelligence Sources
• Bulk data
• Analysing intelligence
• Law, oversight and ethics
• Evidence and disclosure
• Managing information
• Access to information by members of the public
• Funding
• http://www.mi5.gov.uk/threats-and-advice
• Terrorism threat levels
• Resources and Links
• http://www.mi5.gov.uk/our-history
• MI5's early years
• The establishment of the Secret Service Bureau
• World War I
• Carl Hans Lody
• Between the wars
• The inter-war years
• The Soviet threat between the wars
• World War II
• MI5 in World War II
• The Battle for Gibraltar
• Agent GARBO
• Eddie Chapman - Agent ZIGZAG
• Eric Roberts' undercover work in World War II
• Hitler's last days
• The Cold War
• Bad Nenndorf
• The British Empire and Commonwealth
• Klaus Fuchs
• Portland spy ring
• The 'Wilson Plot'
• The threat of subversion
• The later Cold War
• MI5 in the 1990s and 2000s
• Terrorist threat in the 1980s
• Changes and reforms
• Since the Cold War
• The rise of the Islamist terrorist threat
• MI5 at The National Archives
• Centenary History
• Centenary History Policy on Disclosure
• Is it 'MI5' or the 'Security Service'?
• News
• Careers
• Life at MI5
• School Leavers
• Graduates
• Experienced Hires
• Director General's Statement on Publication of the Kenova Report
• Director General Ken McCallum gives threat update
• Death announced of former MI5 DG Dame Stella Rimington
• Opportunities
• Working At MI5
• FAQs
• Contact
• http://www.mi5.gov.uk/about-mi5
• http://www.mi5.gov.uk/cy/cy-about-mi5
• http://www.mi5.gov.uk/fa/fa-about-mi5
• http://www.mi5.gov.uk/fr/fr-about-mi5
• http://www.mi5.gov.uk/ar/ar-about-mi5
• http://www.mi5.gov.uk/ru/ru-about-mi5
• http://www.mi5.gov.uk/ur/ur-about-mi5
• http://www.mi5.gov.uk/zh-hans/zh-hans-about-mi5
• Cookie Policy
• Accessibility Statement
• Terms and Conditions
• Privacy Notice
• Sitemap
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• History
• http://www.mi5.gov.uk/#mm-23
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• http://www.mi5.gov.uk/#mm-35
• http://www.mi5.gov.uk/#mm-36

• National Protective Security Authority
• https://www.sis.gov.uk/index.html
• https://www.gchq.gov.uk

            Domain Name: MI5.GOV.UK
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Updated Date: 2025-09-16T13:44:44Z
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