(Disclaimer: I only hear bits of the show about twice a week so I could have missed a relevant announcement)
Both her and Jamie went on holidays a few weeks ago, but now he is back and has a(nother?) different sidekick.
BGT starts again soon too, which would be a rough schedule to keep for a daily breakfast show.
And it's not like they have been getting rave reviews as a breakfast duo either (in my local area someone started a petition to get the old presenters back, and I agree, even based on my relatively brief experiences of both JT and AH)