Place 10 mint leaves and 5 bar spoons of blueberries into a highball glass
Add 3 lime wedges and muddle
Fill the highball glass to the top with crushed ice
Pour in 0.5 oz of sugar syrup and 1.5 oz of white rum
Top up with club soda and stir gently
Top up with crushed ice
Garnish with a mint sprig and bilberries