Navigating the 2025 Updates to BS 5839-1: Ensuring Compliance with the Latest Fire Safety Standards

Introduction

The British Standard BS 5839-1:2025 has introduced significant revisions to the design, installation, commissioning, and maintenance of fire detection and fire alarm systems in non-domestic premises. These updates aim to enhance fire safety measures and ensure systems are aligned with current best practices.​

Key Updates to BS 5839 - 1 2025 UK

1. Mandatory Zone Plans

   In premises with multiple zones on a single storey, especially where occupants sleep, the absence of a zone plan is now considered unacceptable. This change emphasises the importance of clear system documentation for effective emergency response.

2. Enhanced Signal Transmission Requirements

   For residential care homes and supported housing, the standard now recommends the inclusion of facilities to transmit fire signals to an Alarm Receiving Centre (ARC), ensuring timely alerts to emergency services.

3. Preference for Smoke Detectors in Sleeping Areas

   The updated standard advises against the sole use of heat detectors in sleeping accommodations. Instead, it recommends the use of smoke detectors to provide earlier warning and enhance occupant safety.

4. Simplified Manual Call Point Placement

   In multi-storey buildings with phased evacuation strategies, manual call points should now be sited only within accommodation areas, streamlining evacuation procedures.

5. Guidance on System Modifications and Extensions

   The standard introduces clearer recommendations for modifications and extensions to existing fire detection and alarm systems, ensuring that any changes maintain system integrity and compliance.

6. Testing of Multi-Sensor Detectors

   For the first time, BS 5839-1 addresses the testing of multi-sensor detectors. It specifies that these detectors should be physically tested in a manner that confirms the products of combustion can reach the sensors, and that the appropriate response is confirmed at the Control and Indicating Equipment (CIE).

   
   

Implications for Stakeholders

These updates have far-reaching implications for various sectors, including healthcare, education, hospitality, and retail. Organisations must review their current fire detection and alarm systems to ensure compliance with the new standards. Failure to adhere to these updates could result in non-compliance, potentially compromising occupant safety and leading to legal ramifications.​

Staying Informed and Compliant

The Fire Industry Association (FIA) is hosting a series of CPD-certified events, such as the BS 5839-1 Updates Roadshow on 7 May 2025, to provide in-depth guidance on these changes. Attending such events can be instrumental in understanding the practical applications of the updated standard. ​

Conclusion

The 2025 revisions to BS 5839-1 underscore the evolving nature of fire safety standards. At Spartan Fire Protection, we are committed to helping our clients navigate these changes, ensuring that their fire detection and alarm systems are both compliant and effective. For assistance in assessing and upgrading your systems in line with BS 5839-1:2025, please contact our expert team.​