This is a gin based cocktail called Blue Rose and the the strong juniper presence works really well with the blueberries' top floral notes and the earthiness underneath. Ryan Chetiyawardana is fast establishing himself as one of the UK's leading barmen. His contribution to Worship St Whistling Shop in London saw Drinks International name the bar on its prestigious World's Top 50 list.
To make your own, mix two parts of sugar to one part of water. For each litre of sugar syrup you make, add 5ml rose water and 5ml ardbeg.