It’s a Miracle , version 2

[Djgilmour]

Apparently there is another version, the original one.
From a radioshow with RW interview after playing IaM.

Roger Waters: this is the 2nd version of the song that we did. Ehm, because the 1st version was at twice this tempo. It was done with a strong drumming beat in the background. But it didn't fit within the context of this part of the album, so, we had to re-record it. And we'd used The London Welsh Choral over it. But because we changed the tempo, we couldn't no longer use that recording behind the songs, so, what we did - it was Pat Leonard's, actually - was to take the, ehm, choir and to isolate the sound of the choir and to cut them up into 80cm length, throw it all in dustbin, and stick it back together at random. Backwards, forwards, however it come out, and then play it against the track. And because it is in the same key as the track, the random position of what we really recorded at a different tempo and that...strange...ehm, hm, you know, conglomeration of bits of tape works, I think, really well and gives it that weird atmosphere in the background. THIS WAS A GOOD IDEA, PAT! It's an old Beatles trick, I have to say, it's been something he's been dying to do, for like 20 years.

[Yucateco]

Time for the big Roger Waters box set with assorted rarities.