Wincanton, Somerset - Highly combustible bovine methane is suspected of being behind a Devon blaze where firefighters are tackling the county's biggest blaze for a decade.
Acrid fumes reminiscent of charred Welsh Rarebit have engulfed the area as explosions continued to rock the factory site.
The processing plant is thought to use milk from herds grazing on new hybrid grasses genetically modified to speed up the lactation process and cut down dramatically on unpleasant gaseous emissions.
Somehow or other the whole curds and whey process has gone tragically amiss as food technicians battle to discover how highly flammable methane fumes managed to dissolve inside the factory's 1,000 gallon churns.
"It could be a bizarre chemical reaction to the aluminium milk vats," a worried production supervisor told reporters, "there's always something or udder going wrong with these GM crop-sourced products."
Earlier this year 24 tonnes of cheese exploded inside a lorry on a bleak stretch of the A359 Galhampton Hill, near Castle Cary.
Heavy duty earth moving equipment is still trying to restore the charred landscape.