I've been thinking of this tune for a long time. I heard it at a funeral last year, sung by a choir. It was so beautiful. Oddly a few days later I heard Westlife (who I don't normally like) had released it as a single. You can see the video here.
I associate the tune with this person and their death, which is funny because Westlife's video is all about a wedding. This version is not as good as the choir one at the service but it's best I have found on the net so far.