Juniper refresher

A suggestion of gin & tonic but in lemony, soft drink form. Combine 1 teaspoon cracked juniper berries, ½ teaspoon fennel seeds and ½ teaspoon coriander seeds in a pan with 100g (3½ oz) sugar and 75ml (⅓ cup) water. Heat slowly to dissolve the sugar, then simmer for 7 minutes. Cool and squeeze in 100ml (scant ½ cup) lemon juice. Strain into a jug and top with 500ml (2 cups) chilled sparkling water.