Post-Brexit uncertainty looms for Italy's Prosecco Italy exports a whopping 130 million bottles of Prosecco to the United Kingdom annually, its largest market, and before a crucial vote at the parliament Tuesday on Brexit, winemakers here are worried. IMAGES of vineyards and prosecco bottling AND SOUNDBITES of the president of the prosecco DOC consortium Stefano Zanette, winemaker Angelo Facchin and the head of the Conegliano Valdobbiadene DOCG Prosecco consortium Innocente Nardi