The fire that tore through Baldock industrial estate last week was started by a wood burning water boiler, the Comet can reveal.
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However it has now been established where the fire started, with a spokesman confirming to the Comet: "Hertfordshire Fire and Rescue Service, having completed an investigation into last week’s major fire at Baldock industrial estate, has determined that the fire started accidentally.
"The fire began in the flue of a wood burning water boiler, first spreading to the roof and then throughout the remainder of the building affecting a large number of business units."
READ MORE: WATCH: Fire rips through Baldock industrial estate
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