Haybiscus Fizz

Name: Haybiscus Fizz
Ingredients: 3⁄4 oz Hayman's Sloe Gin; 1 oz Hayman's London Dry Gin; 1⁄2 oz Giffard Hibiscus Syrup; 3⁄4 oz Lemon juice; 1 1⁄4 oz Thomas Henry Pink Grapefruit soda