The Independent Review of Building Regulations and Fire Safety led by Dame Judith Hackitt made a number of recommendations to enhance the safety of buildings, including to reinstate an enhanced manual to the building regulations.
DLUHC has published an updated version which has been designed to be clear and useful for a range of audiences, and is split into two volumes: an accessible overview and a more detailed set of guidance.
More information can be found here:
https://www.gov.uk/guidance/building-regulations-and-approved-documents-index
