The jury was told the fire spread up the stairs, helped by an open window at the top of the landing.

BBC: Derby death blaze trial told the fire 'would have roared'

The newspaper reported on its microblog that the fire spread rapidly, with industrial boilers exploding, and only a side door to the building was open with the rest of the exits locked.

NPR: Fire Kills 119 At Poultry Plant In Northeast China