Cadenheads is located in the heart of Marylebone village, on the site where Lady Diana's wedding dress was made in Chiltern Street. Cadenhead is Scotland's Oldest independent bottler & was established in 1842.ÃÂ The shop specialises in the single cask whiskies. What that means, is that we go to the different distilleries, purchase one cask of whisky & only bottle that one cask, making all of their whiskies special editions with very limited numbers bottled. Depending on the cask size, you are lucky to get 300 bottles of whisky from one cask!ÃÂ In addition, most of the whiskies that are sold & tasted are at cask strength, giving you the purest form of whisky possible.