Correspondence

Ministerial letter on cyber security to leading UK companies

Ministers and security chiefs have written to leading UK companies about cyber security.

From:
Department for Science, Innovation and Technology, National Cyber Security Centre, Cabinet Office, HM Treasury and National Crime Agency
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Department for Business and Trade, The Rt Hon Liz Kendall MP, Dan Jarvis MBE MP, The Rt Hon Peter Kyle MP, and The Rt Hon Rachel Reeves MP
Published
14 October 2025
Last updated
14 October 2025 — See all updates

Documents

Ministerial letter on cyber security

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Ministerial letter on cyber security

PDF, 290 KB, 2 pages

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Hostile cyber activity in the UK is growing more intense, frequent and sophisticated. In light of recent cyber incidents, the government has written to leading UK companies with urgent advice to help ensure they are best protected against cyber threats. 

The letter sets out 3 actions large businesses can take to improve their cyber resilience:

  1. Make cyber risk a Board-level priority using the Cyber Governance Code of Practice

  2. Sign up to the National Cyber Security Centre’s Early Warning service

  3. Require Cyber Essentials in your supply chain

This letter is being sent to all companies in the FTSE100 and FTSE250, as well as a number of other leading UK firms.

For smaller businesses, a free Cyber Action Toolkit is now available to help protect against cyber threats.

Updates to this page

Published 14 October 2025
Last updated 14 October 2025 href="#full-history">+ show all updates

  1. Added link to the new Cyber Action Toolkit for smaller businesses.

  2. First published.

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