Cheap as Chimps
Cheap as Chimps was a spin-off of Monkey News, created as sort of insurance, in case there "hadn't been much Monkey News that week". It involved Karl finding out how much a chimp cost, and how many bananas a day they needed. The feature only ran for a couple of episodes (in 2003), never really having legs. The reason Karl gave for winding it up was that Donal McIntyre had nicked the idea for his Channel 5 show. And he found out on a highly illegal website that chimps weren't cheap.
The first Cheap as Chimps was in Episode 53 (15 March 2003).