It's still not fair to go pointing the finger of blame on individuals until we know for sure who/ what caused the fire to spread as it did.
When a local authority awards a contract it normally does so after a long period of consultation/tendering/submitting quotes and a huge paper trail. Take for example the recent extensive modernization of my dads local authority bungalow. The local authority had a pot of money, they tendered for a main contractor. Eventually (years later) the contractor was appointed and they then awarded contracts in their own right to various other trusted and experienced suppliers and contractors. Kitchens, central heating, plumbing, bathrooms, decorating, flooring etc.
Now just suppose..... The central heating blew up (heaven forbid) and it turned out that the wrong pipes had been used (or whatever example you choose) then the person/company with whom the blame should lie would be the central heating contractor, not the local authority (who cannot be an expert on everything).
If, it turns out (and it's still very early days) that a faulty or incorrect material was used to clad these flats then the person or company taken to task should be the contractor responsible for that. How can it be the fault of the LA or indeed Teresa May (as some suggest) ?