Good to have you back, Malcolm. This is a lovely, lovely tune you have here, and I think the Celtic influence shines thru. The lyrics and melody combine to be at once both joyful and melancholy as befits the subject matter. Very poetic.
Now, on to vocalists: while the robo-gal is really quite impressive for what she is, I think your music deserves the real thing. Can you not dig up some songbird at the local pub, feed her a few pints and put her in front of a mic?

Seriously, I think a real singer would make such a huge difference, especially on a song of this calibre.
I enjoyed this very much.