Old Ale. Ola Dubh is a collaboration between Harviestoun Brewery and Highland Park, Distiller of the Year. With more than a stylistic nod to the classic Imperial Porters (and Stouts) of the nineteenth century, this deliciously rich, dark beer is the first ale to be aged in malt whisky barrels from a named distillery and, with traceable casks and numbered bottles. Aged in casks that previously held 21 year old Highland Park Whiskey; wooden sweet flavour with bitter chocolate, smoked peat moss and a touch of vanilla. 8% ABV.