The Proof of this Pudding

You will find plenty in the highlands of Scotland, but as far as I know this place is unique in London. Here, you can buy cask strength whisky and rum, from the cask (not to mention the hundreds of varieties they have in bottles) Caldenhead's Whisky Shop in Covent Garden is a an outcrop of Caldenheads, Scotland's oldest whisky bottlers and one of those fascinating little shops that you really must visit. Those numbers on the casks are alcohol by volume, so that rum is 136% proof. Mmmmmmmmm.