Studio E Architects’ project lead for the Grenfell Tower refurbishment has admitted he was not familiar with a key section of fire-safety guidance for high-rise buildings at the design stage of the firm’s work.

Bruce Sounes, an associate at the practice, told the Grenfell Tower Inquiry that he had not read Section B4 of Approved Document B during his time on the refurbishment project.

The section, which explicitly deals with the use of combustible materials on the external envelope of high-rise buildings, gives two routes to compliance with Building Regulations.

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