Prepare your glass: Start by filling your favorite cocktail glass (a highball or Collins glass works great) with ice cubes. This will ensure your drink stays cold and refreshing.

Mix the base: In a cocktail shaker, combine 2 oz of gin, 4 oz of lemonade, and 1 oz of simple syrup. Add a handful of ice to the shaker and shake vigorously for about 15-20 seconds until everything is well mixed and chilled.

Strain and pour: Strain the mixture from the shaker into your prepared glass filled with ice.

Top with soda: Add a splash of soda water to the top of your drink for some fizz. You can adjust the amount based on how bubbly you want your cocktail to be.

Garnish and serve: Add a lemon slice and a sprig of fresh mint to your drink for that extra touch of elegance. Now, take a sip and enjoy your homemade London Lemonade!