Fill a cocktail shaker with ice. Add 50ml of London dry gin, 20ml of lime cordial, 10ml of oude genever, 5ml of fresh lime juice, 5ml of fresh lemon juice, and 5ml of rich simple syrup.
Shake hard and strain into a chilled coupe. Express a lime zest twist over the drink and discard it, then garnish with a lime wedge on the rim.