A report by prof. Paolo Vannucci told three years in advance that dust made Notre-Dame's attic highly flammable, that no extinguishing system was present, That the risk of fire was very high, and recommended to install some automatic extinguisher, optionally using powder.
(Italian) ilsole24ore.com
(French) marianne.net - liberation.fr
The French government acted exactly as it uses to and is known to act:
It didn't let remove the dust.
It didn't let install an extinguishing system.
But it made the report secret "because it could inspire terrorists".
I wonder if communist Albania was as opaque and compulsory secretive as the French state is.
And the result is here.
The fire won't change the French state's habits. About lead oxide in the fumes, it acts presently exactly as it uses to.
Oh, and Pascal Paillard, head of the Materials and Metals Department at Nante's Institute for Materials, also tells that the smoke was yellow due to lead oxide. The same colour was observed in the cathedral fires of Reims in 1914 and Chartres in 1836, which had lead roofings.
More to come