that was the building contractor, rydon.y advice. it suggested that the big american cladding manufacturer arconic knew it was dangerous. the bbc has already revealed that a product certificate for the cladding did not include crucial information, that tests in france had given it poor ratings for fire safety — grade e. a is best. today the inquiry heard about internal arconic e—mails. a technical manager said this product was too dangerous for the outsides of building. as he was writing, grenfell tower was having a product fitted which does this when exposed to flames. arconic has said building designers must do their own safety tests. because no one is accepting blame, this will be a long process and the families will have to wait. it has to be thorough and it has to be transparent. you need time for all this but we are here to ultimately get the truth and justice. these will be highly technical hearings. they'll last until april 2021. tom symonds, bbc news, at the grenfell tower inquiry. the european union's chief brexit

that was the building contractor, rydon.on cladding experts for fire safety advice. and it suggested that the big american cladding manufacturer arconic knew it was dangerous. the bbc has already revealed that a product certificate for the cladding did not include crucial information, that tests in france had given it poor ratings for fire safety — grade e. a is best. today, the inquiry heard about internal arconic e—mails. a technical manager said this product was too dangerous for the outsides of building. as he was writing, grenfell tower was having a product fitted which does this when exposed to flames. arconic has said building designers must do their own safety tests. because no—one is accepting blame, this will be a long process and the families will have to wait. it has to be thorough and it has to be transparent. you need time for all this, but we are here to ultimately get the truth and justice. these will be highly technical hearings. they'll last until april 2021. tom symonds, bbc news, at the grenfell tower inq