The John Walker, Last Cask is the final release of The John Walker. Credit: Johnnie Walker.

Diageo’s Scotch whiskey brand Johnnie Walker has released a limited-edition whiskey, The John Walker, Last Cask.

The latest release, according to the company, will be the last ever in this masterclass in whiskey making.

Globally, the company has released just 330 bottles of the limited edition whiskey.

Johnnie Walker master blender Dr Jim Beveridge said: “We combine extremely rare grain expressions from Cambus, Port Dundas and Cameronbridge, which creates delicate flavours including notes of honey sweetness, subtle spice and soft fruit character.

“A vatting of exceptional single malt whiskies offer deeper, more robust aromas of dried fruits, with waves of citrus fruits unfolding from the distilleries of Glen Albyn, Cardhu, Mortlach, Clynelish and Dailuaine before culminating in the unmistakably warm and peppery smokiness of Talisker.”

With 40% alcohol by volume (ABV), The John Walker, Last Cask will be available in select markets from August for a recommended retail price (RRP) of CNY21,835 ($3,103) in China.

The John Walker, Last Cask is packaged in a hand-blown Baccarat crystal decanter. It is crafted using six single malt whiskies and three rare grain whiskies that are expertly combined to ensure exceptional depth of flavour.

Whiskies used to create the new expression are said to be sourced from just nine distilleries that were in existence during the lifetime of Johnnie Walker founder John Walker (1805 – 1857).

The selected whiskies were first matured in individual casks to develop specific flavours unique to each distillery. During the second maturation step, the single malts and grains were brought together in two separate vattings, before the final marrying in a bespoke cask made from 100-year-old oak staves.