Asked to name the wine most associated with Scotland, a cynic might claim Buckfast, the 15 per cent alcohol drink made by well meaning monks hundreds of miles away in Devon, which north of border has earned the moniker “commotion lotion” for its habit of getting those who drink it involved in fights. But not for much longer. For in September, as Scots prepare to cast their votes in the independence referendum, the country’s first wine grapes are set to be harvested from a sloping vineyard in Upper Largo on the south coast of Fife, just across the…