For the first time in god knows how long, a legit Sex Pistols rarity has hit the market. A few months ago when the 35th anniversary edition of Never Mind The Bollocks, Here’s The Sex Pistols was announced one of the major selling points was the long rumored and thought to be lost studio demo of “Belsen Was A Gas” with Johnny Rotten on vocals. The demo is now posted online via the band’s YouTube channel and you can see it below. The song originally appeared in live form and a studio version with Ronnie Biggs on vocals on the band’s posthumous The Great Rock ‘n’ Roll Swindle collection. You can also see a video preview of The Bollocks Diaries, the massive booklet coming with the new reissue, below as well.