One of the delights of May is the Elderflower. Some make Cordial; I make Champagne.
Take 6 heads of sun-kissed Elderflowers, 650 gms sugar, the zest and juice of a Lemon, 2 tablespoons of colourless vinegar, and 6 litres of water. Mix. Leave for 24 hrs. Bottle, and leave for at least 2 weeks. It's as simple as that.
2 provisos; firstly you MUST use those wired-on flip-top bottles, and secondly always open the bottles outdoors, they can be extremely fiery.