Joe ...

Good point ... I was about to make it mnyself.

However I've done a bit of background research and I think I can provide the details you're after:

Source Information - The humble grape

Composition Date - Wine has been produced continuously since man first learned to swally. However the consumption of wine in vast quantities (aka "skullin'") has been perfected by the good people of North Armagh in the past twenty or thirty years, thanks to the good monks of Buckfastleigh Abbey who bring their healing ministry to all regardless of creed or colour.