the lost demo version of the song was rediscovered during a move from virgin records to universal music catalogue in january 2012. it was included in the "never mind the bollocks, here's the sex pistols" box set that was released on 24 september 2012. this demo version features very faint, reverbed vocals. a different version of the song – titled simply "belsen was a gas demo 2" – was released as part of a single box on 19 april 2014.