Many more articles there
Excellent link.
Two of the three identified victims have Muslim names, and the third victim has a name that is clearly not British.
I had not realized the building was public housing.
ISIS terrorism, or just old fashioned arson by a disgruntled resident, cannot be ruled out.
However, I had not realized the exterior of the building caught fire first (the “cladding” issue), which could mean the initial fire was accidental, and bad luck caused the catastrophe.