The Negroni is a classic Italian cocktail that has gained popularity in London in recent years. Made with equal parts gin, Campari, and sweet vermouth, it is a bold and bitter drink that is perfect for those who enjoy strong flavors. Many bars in London offer their own twist on the Negroni, using different types of gin or adding unique ingredients to enhance the flavor. If you're a fan of bitter cocktails, the Negroni is a must-try when visiting London.