Bottling the elderflower champagne

Job done - the elderflower champagne was bottled yesterday. The bottles were cleaned in detergent and then steeped in cold water to rinse them. 22 bottles were made. I have a feeling however that I may have left the elderflower champagne in the fermenting bucket for too long. I could turn to vinegar. This happened three years ago. The result was 33 bottles of elderflower vinegar. None of it went to waste. If we have managed to repeat our mistake, we simply replenish our supply of vinegar. There are still 15 bottles of champagne left from last year to use up so we won't go short. And in the late summer, I'm going to have a go at making red champagne from blackberries and elderberries.