ladypimusic,

It's a very nice tune.

Do you have a source for the sheet music, including the melody line?

This is more or less what I hear on the recording:

It's All Forgotten Now-Rev JE - Ray Noble

This is in your key of F. The recording I listened to is in Ab, C, and Eb.
https://www.youtube.com/watch?v=M2HJj02rmJs

Cheers,
Jer