"As regards cladding, it should be funded by the firms that installed / made the cladding."
While the lawyers are suing one another to ascertain who made it, who specified it, who installed it etc, it will almost certainly be cheaper to pay for it. There's a genuine problem here in that materials may not be made for the purpose to which they are put, and if they are, who said they could be, blah-de-blah... or even if the testing regime was adequate as in the case of metalised mylar (Swiss Air disaster q.v.)