If you check the Discography, you’ll see that it was originally released in 2010 as an extra track on “The Cave” single (not the EP). Since then the song has gone through many changes, most recently with the addition of a chorus and a bit more of a rock feel. You can watch a video of this brilliant updated version here, and listen to and download the mp3 here.
As you will hear, the new chorus contains the words “I will wait, I will wait for you,” leading many to believe that the updated version of this song will be on the new album with a new title: “I Will Wait”. Only time will tell!
Again, I don’t have any insider information on Babel, so your guess is as good as mine.