That's a clearly untrue statement that does nothing to elucidate the situation. We all know that many/most plastics are flammable, we all know that they are less so than petrol. A very simple test will prove this, disprove the assertion and cast doubt on the reliability of everything else they say.The cladding was "More flammable than dropping a match into petrol"; https://twitter.com/UKDemockery/status/1004019293653291013