Yes, but I would question the “stay put” policy - given that the building was designed using a fire-proof compartments strategy with protected escape routes, the fire, which presumably spread from the cladding to the interior of the flats via the external windows (it is unlikely the windows would be fire-rated) it should not have spread from one flat to another or to the escape stairs.
The fact that the Fire Brigade specified a “stay put” policy implies that they knew the escape routes were compromised and not properly protected from the flats’ interiors by compliant fire doors and smoke seals.