Research and analysis

Cyber security longitudinal survey: wave five results

Wave five of the government's study tracking the cyber security behaviours of organisations.

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The Cyber Security Longitudinal Survey (CSLS) helps us better understand cyber security policies and processes within medium and large businesses and high-income charities. It explores the links over time between these policies and processes and cyber incidents.

This is the fifth phase of the research and therefore this report enables us to make comparisons with previous phases of the research:

This report also summarises additional insight from a number of follow-up qualitative interviews with survey respondents.

This research is part of the government’s work to improve the UK’s cyber defences and ensure new and existing technologies are safely developed and deployed across the UK.

For more information on the cyber security behaviours of organisations, please see the annual Cyber Security Breaches Survey.

Updates to this page

Published 17 February 2026

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