The Radiohead front-man has confirmed that he is being the SISI BAKBAK moniker and therefore confirmed that it was indeed him that remixed SBTRKT's "Hold On" back in 2012. Until now, that was a mystery to all! It was via Radiohead's official website, the W.A.S.T.E store now lists the remix under the 'Thom York/Atoms For Peace' section of the site.
Scroll down to listen to it!
Scroll down to listen to it!