National foreword

This British Standard is the UK implementation of EN ISO 21043‑4:2025. It is identical to ISO 21043‑4:2025.

The Forensic Science Regulator for England and Wales defines, for some forensic science activities undertaken in England and Wales, the mechanisms with respect to compliance with the Forensic Science Regulator (FSR) Code of Practice. This Code of Practice is available for download on the FSR website: https://www.gov.uk/government/organisations/forensic-science-regulator.

For more information regarding the delivery of forensic sciences in Scotland and Northern Ireland, please refer to the Scottish Police Authority (https://www.spa.police.uk/what-we-do/forensic-services/what-we-do/) and Forensic Science Northern Ireland (https://www.justice-ni.gov.uk/articles/about-forensic-science-northern-ireland) websites.

The UK participation in its preparation was entrusted to Technical Committee FSM/1, Forensic Science Processes.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2025.

Amendments/corrigenda issued since publication

Date	Text affected

BS EN ISO 21043-4:2025

Forensic sciences - Interpretation

Current

Published:

30 Jun 2025