He had a pre-recorded interview slot but it didn't last long.
Yes, as memorably promoted by Bob saying "If I disagree with someone, I'll just say 'that's bollocks'".
As you say, it didn't last very long, the interviews were stripped throughout the week but they were never very interesting and increasingly seemed out of place amid the rest of the show, and were gone by the end of the year. After that he appeared occasionally, usually with Zig and Zag in fact. As Morning Glory points out, he was on the first anniversary show with Zig and Zag and, when they said they were out of time, he said "it's time up when I say it's time up!". I also remember him popping up on a couple of the Christmas pre-records, when the first hour was Zig and Zag introducing cartoons, I remember him pretty much co-hosting one of them.