This variation, sometimes called a Foghorn, is typically made with London dry gin, known for its juniper-forward flavor. The herbaceous notes of the gin balance the spicy sweetness of the ginger beer and the tangy zest of citrus. As the name suggests, the London Mule is named after the gin, which has deep cultural ties to England.

Référence : https://www.liquor.com/recipes/london-mule/