What they have done is enhance this within an ex-Champagne cask of a producer that (as far as I could see) only uses Chardonnay grapes. This will certainly enhance the chalky side of the Ardnamurchan and also give extra attention to the lemon in the spirit.
Where the combination of a bold spirit and lemon seems odd (lemon is often associated with light and crispy), this really works well. I am looking forward to what an extended time in such a cask would bring about.
The nose starts rather chalky on crayon an limestone. It's also a bit earthy (clay soil, which is probably called sulphury by some other reviewers). Although there is a solid layer of honeyed malt behind, it is quite fresh on lemon (zest, tonic with lemon, and curd). Next to that (but more distant) there is red apple, grape and lemon.
Full-bodied, rather sweet associated, with also nice acidity. All in all a quite robust feel, but pleasant. The spirit is very solid, with this honeyed cereal and slightly earthy character and seemingly quite some lemon. The maturation gives some sweetness and creaminess, and has enhanced this fresh fruity character with some extra minerality.
Quite long and intense finish, with great interplay between sweeter and acidic notes. A fruit salad with grapes, melon, together with lemon-tonic, banana-custard buns and a bit of spice.