I doubt Paul will, he's a meteorologist by training.
Keeley, Jen, Owain, Kay and Abbie are journalists who have had some training in how to take the forecast somebody else has prepared and interpret it to be able to tell the story on air.
That means they can multi task and work on other non-weather stuff, whereas Paul is very much a weather specialist, and actually able to prepare the forecast himself. (I suspect that these days it's more a case of tweaking the provided forecast with a bit of local knowledge.)
Write that down in your copybook now.