Glenfiddich 30 Year Old Rare Collection Cask No. 20050 whisky review: A fantastically aged Glenfiddich, the masses of dried fruits and tannic and leathery rancio notes of wood and tobacco had me, possibly along with the colour, convinced this may have seen sherry wood during its maturation? They state officially american oak which doesn’t preclude sherry per se but now I’m wondering if this is just a combination of Glenfiddich’s spirit and a long maturation in ex-bourbon casks? Regardless this is a supreme whisky well worthy of inclusion in the rare cask collection and a delightful celebration of Glenfiddich’s 50 years open to the public! 93/100