BBC: "Thirsk waste firm fire 'was spontaneous combustion' "

Link to BBC web site

"A fire at a waste management depot in North Yorkshire was the result of spontaneous combustion, the fire service has said.

"Peter Hudson, from the fire service, said:

"Basically you get the breaking down of organic materials by the bacteria, that creates the heat, and if there's a bit of insulation... that will burn and you end up with spontaneous combustion, and a small fire starts which leads to a bigger fire."