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The Department welcomes the views of industry on all the measures proposed in our December 2022 consultation, including on testing capacity and transition periods for the proposed changes. In this consultation we are proposing to remove the national classification from Approved Document B and utilise the more robust and up to date internationally recognised standard. During the Grenfell Tower Inquiry, the use of the national classification system came under scrutiny, and flaws in its use were presented in the oral expert evidence. The BS 476 series standards have not been reviewed by the British Standards Institution in detail for some time (over 20 years on average). In addition, in the aftermath of the Grenfell Tower and following an investigation by the Department several issues were highlighted with the consistency of fire resistance performance of some fire doors.

Upon completion of the public consultation, and subsequent analysis of the responses, the department will publish, alongside the government response, a full regulatory impact assessment which will include a detailed assessment of the impacts of the changes to the guidance. This assessment will be informed by the responses to the consultation and the evidence provided.

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