The New York Times, along with several British news organizations, has done an excellent job reporting on the Grenfell fire. The technical reasons are still being investigated, but they will certainly conclude that the cladding assembly was the primary reason why the results were so catastrophic.
And who will pay? And how will they pay? Hammurabi would have cast several people into the flames, but such literal punishment doesn't fit well with our modern concept of justice. Presumably, the people high up in the food chain of the British safety organizations will not sleep easy for the rest of their life, but no goats will be driven into the wilderness.
The best outcome is the adoption of NFPA 285 by Great Britain and the costly retrofit of all buildings that have combustible cladding systems.