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  • National Security and Intelligence

    The National Security Secretariat coordinates security and intelligence issues of strategic importance across government and supports the National Security Adviser and National Security Council. The Joint Intelligence Organisation produces independent all-source assessments on issues of national security and foreign policy...

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  • College for National Security

    Find out how the College for National Security is breaking down barriers to improving understanding of national security across the Civil Service and beyond.

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  • Check if you need to tell the government about an acquisition that could harm the UK's national security

    Investors and businesses may be legally required to tell the government about certain sensitive acquisitions under the National Security and Investment Act.

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  • National Security Strategy 2025: Security for the British People in a Dangerous World

    National Security Strategy 2025 identifies the main challenges the UK faces in an era of radical uncertainty and sets out a new Strategic Framework covering all aspects of national security and international policy

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  • National Security Technology and Innovation Exchange

    NSTIx existed until 2025 as an independent unit working across the UK government national security science, innovation and technology system.

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  • National Security Act 2023

    The National Security Act introduces new measures to modernise counter-espionage laws and address the evolving state threat to national security.

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  • National Protective Security Authority

    National Protective Security Authority (NPSA) is the UK’s National Technical Authority for physical and personnel protective security, working to make the UK less vulnerable and more resilient to national security threats. NPSA is part of The Security Service .

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  • National Security Bill: factsheets

    Factsheets giving details of the different measures contained in the National Security Bill.

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  • National Security and Investment Act 2021

    Guidance and information about the National Security and Investment Act.

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  • Terrorism and national emergencies

    Find out about terrorist threat levels, national measures against terrorism and how to report suspect activity