Sapphire Serenade

Name: Sapphire Serenade
Ingredients: 1 oz Hayman's London Dry Gin; 1 oz De Kuyper Blue Curaçao; 2⁄3 oz Lemon juice; 5⁄6 oz Monin Lavender sugar syrup; 1 1⁄6 oz Thomas Henry Tonic Water