Darren Price has released a clip that is actually from this gig:
https://soundcloud.com/dj-darren-pri...-i-love-techno
Yard Beat wasn't really played after 2006, that we know of, but this upload now confirms that he worked up a bit of a different version in 2008. I don't remember hearing it on any other recordings though, so it may not have been played much.
Unfortunately, it sounds like this recording has been edited by Darren. We have a recording of the same song portions from a radio broadcast that we can compare it to. At the 2:24 mark on Darren's file, it's supposed to be Karl coming in with Pearl's Girl lyrics, but instead, it cuts back to a section from the beginning of the file and duplicates that again. At 4:08, it leaves the repeated section and jumps to later in the song, but Karl's vocals are severely muted for the rest of the song. Like maybe his vocal track was omitted entirely, and we're only getting incidental sound of his vocals from, say, an audience mic.
I guess Darren did this to highlight his song, or something? It's a shame, because the recording quality is very nice.