Bobbling stopped, trying to encourage secondary fermentation by transferring to a fresh demijohn via glass jug and paper coffee filter in funnel to remove sediment. Gravity measured at 1.005. Added 25g brown sugar dissolved in warm water, about half a gram of wine nutrient, and a whole sachet of EC-1118 champagne yeast, first revived in warm water. Lost a little bit from the old demijohn due to sediment and filter issues, maybe just over half a pint. Gravity at the end was around 1.009, started bubbling at a rate of 1 in 25 seconds pretty much as soon as the airlock was on, so hopefully we’ll get a good fermentation. New demijohn now store in Mark’s office, where it’s around 22 degrees.