In response to significant industry developments and the successful conclusion of our national roadshow series and digital sessions, the Fire Industry Association proudly announces the release of its official Guidance Note on the changes to BS 5839-1:2025.

As the UK’s leading authority on fire detection and alarm standards, the FIA remains committed to equipping professionals with expert-led, authoritative technical insights. This updated guidance reflects the newest revision of the British Standard for fire detection and fire alarm systems for buildings – a cornerstone document for system designers, installers, commissioners, and maintainers.

What’s changed in BS 5839-1:2025?

The 2025 edition introduces impactful revisions that reshape fundamental aspects of fire alarm system design and compliance. Key updates include:

• Clearer system categorisation.
• Updated rules for detector placement and types.
• Enhanced documentation and maintenance guidance.
• Stronger focus on remote access and cyber security.

Our new Guidance Note provides clear, practical explanations of what’s changed, why, and what it means for those designing, installing, commissioning and maintaining fire alarm systems.

Download the full Guidance Note.

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