The winemakers of Franciacorta in Italy have enjoyed a booming success thanks to their decision to shun the bulk processes used to make Spumanti and Prosecco.

According to Bloomberg wine expert John Mariani, the eastern Lombardy growers focused on imitating the processes used in Champagne, including the use of Pinot Noir and Chardonnay grapes, which were planted extensively.

The making of sparkling wines in the region only started in the 1960s, but by 1995 the area had received official Denominazione di Origine Controllata e Garantita certification, the highest Italian law offers.

It now makes 11 million bottles of wine each year, half of which are produced on the Berlucchi estates.

While admitting that personal taste is everything, Mr Mariani says that many Franciacorta wines compare favourably with mid-range Champagnes, but are available at lower prices.

"I was most impressed by Contadi Castaldi Rose non-vintage whose minimalist label covers an impressive sparkler that upon opening foams in the glass, retaining an effervescent head of bubbles long after," he notes.