Single malt Scotch whisky is one of the most revered spirits in the world. It has such scope for variation, it can offer complexity or simplicity, unbridled power or a subtle whisper. To legally be called a single malt Scotch, the whisky must be distilled at a single distillery in Scotland, in a copper pot still from nothing other than malted barley, yeast and water. It must then be aged in an oak cask for at least three years and a day, and be bottled at no less than 40% abv.