>> skelton: yeah.ry successfully here in the u.k. >> stahl: what used to be a minute cottage industry run by retirees and gentleman farmers is today one of the fastest wine-growing regions in the world. this is quite an operation going on. >> skelton: oh, it's big. it's a big winery. >> stahl: in 2018, the vintage in england was so bountiful that some vineyards had to scramble to buy vats and tanks to hold it all. others simply threw grapes away. by the end of the decade, winemakers here will produce an estimated 20 million bottles a year. >> skelton: the foundation of today's industry is the fact that we can grow these varieties, which we couldn't grow earlier. >> stahl: so, why couldn't you do it before? >> skelton: because the-- the climate was too cold. >> stahl: you just had to get the temperature up and-- >> skelton: yeah. >> stahl: so, does global warming mean that england now has more days for the grapes to ripen? is that-- >> skelton: yeah, because we have more days over 85, 86 degrees fahrenh