Build the ingredients over cubed ice in a highball glass. Garnish with finely cut rhubarb, apple julienne sticks and a slice of ginger.
Caorunn Gin is available in selected Waitrose, Tesco and Sainsbury's stores along with Oddbins, The Whisky Shop, The Conran Shop, Harvey Nichols, Fortnum & Mason and more. RRP £27. For more info: caorunngin.com