Put the sugar and citrus strips in a large bowl. Muddle a little, cover and leave at room temperature for 1 hour.
Remove the citrus from the sugar and discard. Depending on the flavour you are making, add the elderberry flowers or fruit, herbs or ginger, then muddle to release some of the juice. Cover and chill for 24 hours.
Add the vinegar and muddle again, mixing well. Stand f