They haven't turned up in any episodes we've documented thus far. Judging from the little red/gold design thing at the beginning of each of those, they probably had some sort of on-screen name that was pasted over for the international versions (they used the same thing to cover the logo for Leslie Mostly, for instance). If that's the case, we might be able to make a page for the series.
That's a solid theory. The empty title cards seem like they might have been backdrops for text that might change given a live situation. I wonder about the (Channel?) 2 logo in the corner of three of them though.