Isobel Campbell was still part of Belle and Sebastian when she began to record and release solo material under the guise of The Gentle Waves. Some of the stuff on the debut album, The Green Fields Of Foreverland, was decent but some if it was so twee it bordered on the unlistenable. In 2000, she released a four-track EP, of which this was the lead track:-
Four members of B&S played on the record and you could be pedantic and argue it isn’t really a solo release. That’s your prerogative.
Personally, I think it’s a wonderful and magical few minutes. And it dosn’t matter how it’s badged.