Are these mattresses flame retardant?

Our Softheads mattress had a faulty electric blanket cable next to the side, which sparked and the bed burst into flames, luckily we had an extinguisher to hand. Softheads collected the mattress and promised an independent flame retardancy test, to see why. After some months of chasing they provided a test certificate with no provenance. They declined to confirm who had conducted the test, so we assumed it was done by themselves, if at all. They then declared they had dumped the mattress. I have been advised that the sample of the fabric that I have retained cannot be tested in isolation, therefore we will never know the truth in the matter, as the mattress has been discarded. Unable to recommend.

07/01/2023