This found compelling evidence that the rapid propagation of the fire at Grenfell Tower was due largely to defects in the design and installation of the windows and external cladding on the tower.
Daeth hyn o hyd i dystiolaeth gref mai’r rheswm pennaf dros ledaeniad cyflym y tân yn Nhŵr Grenfell oedd diffygion yn nyluniad a gosodiad y ffenestri a’r cladin allanol ar y tŵr.