Singapore Sling (using Old Tom gin)

Name: Singapore Sling (using Old Tom gin)
Prep time: 5 min
Cook time: 5 min
Total time: 5 min
Yield: 1 cocktail
Cuisine: Cocktail
Ingredients: 2 dash Angostura bitters; 6 cl Gin; 1 Sodavatten; 3 cl Citronjuice; 1.5 cl Cherry Heering; 1.5 cl BéNéDictine