In reply to mick taylor:
elderberry on its own makes a nice port type wine if left for over 3 years, otherwise its nicer blended perhaps with the damsons. Ive made a blend of cranberry blackberry and elderberry in equal parts.
Its hard to guess the final flavour of the wine untill all the sugar has gone as some fruit taste quite odd when they arent sweet. Be patient, then have fun one evening blending a glass full at a time, preferably with a friend for comparison of flavours.