I’ve been away for a few days and before I went I released the pressure on the bottle and left it slightly loose. Just as well as it’s brewing away madly. The high notes of the elderflower fragrance have gone but it tastes more mature as a drink. The fact I used bread yeast doesn’t seem to have made it taste like a loaf and I feel more confident in the live brew I’m tipping into my tum. I wish I had more time because I’d like to try this again but with pouring boiling water over the flowers and sugar mix to kill off the natural yeast and then introducing the bread yeast, but my life is a bit buzy just now.
This is definitely worth doing.