However, today we're having this...........
15ml fresh lemon juice
15ml sugar syrup (I always have this ready in the fridge, it's easy to make and lasts for yonks if you don't use it!)
Pour the gin, lemon juice, sugar syrup and ice into a shaker. Shake shake shake then strain the liquid into a serving glass (one of those tall elegant champagne glasses) and top with chilled champagne. Garnish with a lemon twist and a red cherry.