A mechanical and electrical systems consultant on the Grenfell Tower refurbishment project recommended the use of combustible insulation on the outside of the block as a way to meet an “aspirational” thermal efficiency target, the probe into 2017’s disaster has heard.

Thursday’s session of the Grenfell Tower Inquiry took evidence from Andrew McQuatt of building services engineering consultancy Max Fordham, who said he had proposed Celotex FR5000 insulation for the scheme in an August 2012 email to architect Studio E.