I am hopeful it exists.. I was searching on Monday and found this tweet:
https://twitter.com/FilthyMank/statu...37892901498880
"Just been sent the Band Aid 30 track remixed by @underworldlive not what I was expecting #curveball"
So either the guy is lying, or the promos are circulating. The only info I saw on the release was on Wikipedia, but there has also been some attention to the Underworld remix in the music press so it would be a shame if it was false.