The technical services manager at the makers of one of the insulation products used on the flawed refurbishment of Grenfell Tower had not seen the test reports of the combustible product on which he was advising the industry, the inquiry has heard.

Andrew Pack, who worked as Kingspan’s global technical support manager, admitted yesterday that the fire test reports for the firm’s K15 insulation were “kept secret” by those who were undertaking the tests.