As far as I can tell, the Walker-sung track (he didn't write it), appears orginally on "The World Is Not Enough" soundtrack, and was recorded at roughly the same time. Nice to know he can still do it when he wants to. Didn't make it into the movie...suprised?
In 1997 Walker recorded this cover of dylan's "I Threw It All Away" for another film soundtrack. I prefer dylan's version, but it's interesting nonetheless.
Also, my Walker Brothers collection does not include this song, and is so woefully imcomplete: