The tracklisting is fake as you could have read. That almost most certainly means that the track is fake as well. And to be more precise, it is fake as confirmed by XL-Recordings ;)
Oh, and in the Collectors thread someone posted something about trading items. If you go to his or her web site you can see a 'scan' and tracklisting of No Souvenirs... We probably all remember Greg Bedwell with his made-up No Souvenirs? Well, that's what you will find on that persons web site! ;p As you can see, some people really believe everything they are told...!