Source www.bbr.com :
North British Distillery Grain Whisky
North British, a grain distillery, is the only remaining distillery in Edinburgh. It is a very large distillery, producing over 64,000,000 million litres of whisky every year. In 1916 the distillery was outfitted with facilities to produce acetone from maize, and creates spirits such as gin and vodka, in addition to its whiskies.
North British does not produce its own single grain whisky, but instead contributes to many famous whisky blends, including Cutty Sark, Famous Grouse and Chivas Regal.
NBDG , NBD