The contractor who packed the window surrounds of Grenfell Tower with combustible insulation and finished the reveals with combustible uPVC assumed the materials had already been considered acceptable when he joined the project, the inquiry into 2017’s fire has heard.

Mark Dixon of SD Plastering was hired by Grenfell refurbishment main contractor Rydon to deliver new window reveals for the flats in the tower block. The work bridged the cavity between the 1970s building’s original windows frames and the new windows in the new rainscreen cladding system.