Prosecco is a type of sparkling wine protected by a designation of origin, meaning it can only be produced in specific geographic areas of northeastern Italy, primarily in the Veneto region. The wine is made using the Glera grape, which is grown exclusively in this region. As such, making Prosecco in the UK or any other country outside of Italy is impossible.
While it is possible to produce sparkling wines in the UK using the traditional method of secondary fermentation in the bottle, as is done to make Champagne, the resulting wine cannot be labeled as Prosecco, this is because the name “Prosecco” is reserved for wines produced in compliance with the specific rules and regulations of the Prosecco DOC and DOCG appellations.