UK Indie bottler, Hart Brothers trace their origins in the licensed trade back to the late 19th century, however it wasn't until 1964 that brothers Iain & Donald Hart incorporated the company as Wine & Spirit Wholesalers and Scotch Whisky Blenders. Alistair Hart joined the company in 1975 as chief blender, sourcing vintage casks that were not readily available. While supermarkets have previously imported some lower ABV expressions from Hart Brothers, the real excitement is found in their single cask / cask strength selections. This one is no exception being a rare Sherry Cask matured Old Pulteney Single Cask at Cask Strength and reviews suggest this is a banger. 
ABV - 52.6%
Region - Highland / Scotland