Police said they now believed there was an electrical fault with the hob on Mrs Crown's cooker, but could not confirm whether they believed that started the fire or whether an accelerant was used.

BBC: Una Crown

During the Lime Street experiment, other things happened that were supposed to occur only in a fire fuelled by liquid accelerant: charring along the base of the walls and doorways, and burning under furniture.

NEWYORKER: Trial by Fire

If the floor had been soaked with a liquid accelerant and the fire had burned low, as the evidence suggested, Willingham could not have run out of the house the way he had described without badly burning his feet.

NEWYORKER: Trial by Fire