SeCuRE 4

CPNI's Security Culture Evaluation Tool

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Protective Security Management Systems (PSeMS)

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CPNI is the UK national technical authority for physical and personnel protective security advice

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Passport to Good Security

Key principles for a more secure organisation

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Take the tour – learn how to protect your most sensitive or important assets

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What We Do

We are leaders in security, providing resources, guidance and expert advice to help protect and keep your business secure from external threats.

Incident at the Palace of Westminster - Tuesday 14 August 2018

You will be aware of the incident at the Palace of Westminster on the morning of Tuesday 14 August 2018. Metropolitan Police are treating this as a terrorist incident. You may find it helpful to revist our HVM pages which provides guidance on mitigating vehicle-borne threats.

Our Advice & Expertise


Senior leaders need to understand key principles of protective security to guide strategic decision-making.

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CPNI’s protective security methodology is based on the core principles of Deter, Detect and Delay.

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Effective physical security of an asset is achieved by multi-layering the different measures, what is commonly referred to as ‘defence-in-depth’.

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About CPNI

CPNI is the government authority for protective security advice to the UK national infrastructure. Our role is to protect national security by helping to reduce the vulnerability of the national infrastructure to terrorism and other threats.

CPNI in Context

Government policies that impact the work of CPNI include the National Security Strategy, National Risk Register and Counter Terrorism Strategy.

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CPNI Office

Critical National Infrastructure

CPNI is focussed on providing advice and assistance to those who have responsibility for protecting these most crucial elements of the UK’s national infrastructure from national security threats.

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National Infrastructure Tower

Who We Work With

CPNI works with partners in government, police, industry and academia to identify risks to and reduce the vulnerability of the national infrastructure, focusing in particular on critical national infrastructure.

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