Summary: Fermentation is the production stage in which yeast converts sugars into alcohol, ending before any subsequent distillation stage begins.
Reference: Producing Irish Whiskey, Irish Cream or Irish Poteen (opens in a new tab)
HM Revenue and Customs · Reference checked 21 July 2026
Where to look: Glossary table, Fermentation
The summary above is a concise paraphrase of the cited material. It is not a quotation or a complete statement of law.
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