Haha, it's amazing how much moving a digit one place to the left can make the difference.
I was thinking "Eclipse The Bat" could be... well, the male voice reminds me of Markus Lovett, but I don't know if I've ever heard him sing that high. And the female voice... Karine Hannah? Does that seem likely?
I did some googling and stumbled upon something in a copyright database implying that the copyrights for the songs in Bat 2100 and Whistle Down The Wind are all in the same copyright bundle, so... I guess it's from around 1997?