Smirnoff Black vodka, Tanqueray gin and Johnnie Walker Black whisky are to be merchandised together in store this Christmas as Diageo looks to boost its premium portfolio. The company is also planning an 80% hike in festive spend on Smirnoff Black to include a tie-up with GQ; Smirnoff Black Boutique Barbers in Hugo Boss stores; and print ads with a Russian doll shaker.