It's a basic fire engineering issue involving a mix of building materials and installation techniques and regulations, for which virtually all the relevant information is in the public domain.
I think I mentioned earlier that my dad is a professor of combustion engineering who's taught fire engineering to a good proportion of the countries fire officers, and's working up a report on this. He's just not so good at scouring the internet to obtain info that's public domain, nor does he have experience on the installation side of things which some on this thread appear to have (and I do to a more limited extent).
If you're not interested in anything I post on this then feel free to not read it - use the ignore function if you want.
Leave it to the experts is one thing, but leave it to a politically stitched up public inquiry...... sorry, but I can't agree with that.