I have asked this before but have never had a satisfying answer . Why does the BBC employ TWO people to read the news from a prompter each morning ? One says something & then looks at the other one to say a bit then back to the first one.
Maybe it is so they can do longer stints. I have noticed that at times, certainly on sky, there is only one. So presumably the other has nipped to the bog?
The probable response is that this has been the norm in American news shows for decades, and having tried it, the BBC have found, or decided, that it works well.
BBC Midlands Today tried having two presenters (Nick Owen and Mary Rhodes), but quickly abandoned the idea. The equivalent programme on ITV, though, continues with two presenters. No reason why one person can't manage alone.