A relevant excerpt from the article. Leaving aside the well-known problems with the material and prohibitions against using it in this type of application -- in the U.S. and elsewhere -- this was the state of regulation, experience, and response in Britain post-2000:
Business-friendly governments in Britain — first under Labor and then under the Conservatives — campaigned to pare back regulations. A 2005 law known as the Regulatory Reform (Fire Safety) Order ended a requirement for government inspectors to certify that buildings had met fire codes, and shifted instead to a system of self-policing. Governments adopted slogans calling for the elimination of at least one regulation for each new one that was imposed, and the authorities in charge of fire safety took this to heart.
“If you think more fire protection would be good for U.K. business, then you should be making the case to the business community, not the government,” Brian Martin, the top civil servant in charge of drafting building-safety guidelines, told an industry conference in 2011, quoting the fire minister then, Bob Neill. (“Should we be looking to regulate further? ‘No’ would be my answer,’” Mr. Neill added.)
Mr. Martin, a former surveyor for large-scale commercial projects like the Canary Wharf, told his audience to expect few new regulations because the prime minister at the time, David Cameron, wanted to greatly reduce the burden on industry, according to a report by the conference organizers.
Two years later, in 2013, a coroner questioned Mr. Martin about the application of building regulations in the case of another London fire, which killed six people and injured 15 others at a public housing complex called Lakanal House. Mr. Martin defended the existing regulations, including the lack of a requirement for meaningful fire resistance in the paneling on the outside of an apartment tower.
A questioner told him that the public might be “horrified” to learn that the rules permitted the use of paneling that could spread flames up the side of a building in as little as four-and-a-half minutes. “I can’t predict what the public would think,” Mr. Martin replied, “but that is the situation.”
Moving to a requirement that the exterior of a building be “noncombustible,” Mr. Martin said, “limits your choice of materials quite significantly.”
After the coroner’s report, a cross-party coalition of members of Parliament petitioned government ministers to reform the regulations, including adding automatic sprinklers and revisiting the standards for cladding. “Today’s buildings have a much higher content of readily available combustible material,” the group wrote in a letter sent in December 2015 that specifically cited the risk of chemicals in “cladding.”
“This fire hazard results in many fires because adequate recommendations to developers simply do not exist. There is little or no requirement to mitigate external fire spread,” added the letter, which was first reported last week by the BBC.