The firm which manufactured the flammable insulation installed on Grenfell Tower “took advantage” of the confusion at a key building control body to obtain a fire safety certificate stating that its product was safe for use on high rise buildings.

Former product manager at Celotex Jonathan Roper admitted yesterday that he had not corrected a misunderstanding about building regulations by Local Authority Building Control (LABC) technical sales director David Ewing because it was “viewed as advantageous not to”.

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