Like "Come Dine with Me" but with people on a diet...
"And coming up next, we have a brand new show for you!"
The man who did the voice-overs had the perfect voice for such a job - he sounded like he actually cared about whatever show was next on the schedule. He also managed to make it sound interesting.
"With a mix of cookery, competition, arguments and weight loss, surely this new show is a recipe for success!"
"So here is, Come Diet with Me!"