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The site processes waste water, sifting out solids, and produces biogas and a form of fertiliser.

The reports, written by a consultant brought in to assess the site in 2014 and 2015, warned Wessex Water about safety concerns across parts of the plant, including digesters, gas holders and biogas pipework.

"From the start of the plant all the way through to the holding tank, the complete biogas system was dangerous," he said.

In 2021, the EPA updated its definition of food waste to include composting and anaerobic digestion — both of which can take inputs like uneaten food and turn them into fertilizer or biogas, respectively.

It is possible to run Glen Sannox on biogas, which is produced from organic waste such as manure or by-products from the whisky industry.