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I think this is the specification of composite panel used on the building, it's PIR
https://www.celotex.co.uk/products/rs5000
Now look at the difference in performance between rockwool and PIR
marcomarcos-
That is absolutely brutal, the difference is stark, you wonder why the PIR stuff is not just completely banned, scary stuff!
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Wow...
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Now look at the difference in performance between rockwool and PIR
That's interesting, and a little alarming (well, it's a commercial promotional video, it's meant to alarm you despite all the caveats they include) - I hadn't realised at all that PIR wasn't non-combustible.
Bernhard
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jsabine
There should be firestops in that cavity behind the cladding so there are no voids bridging compartment floors (or walls but floors more important). That's pretty basic.
(The cladding itself should also not be easily combustible)