“He might not even come back on the first of September, so who knows,” confessed the host.
Kate also revealed she would be absent from the news desk next week as she helps her children prepare to go back to school.
“I’m actually not here next week, I’m off helping Billy get sorted for secondary school, Darcey as well gets into school and also Derek – to look after things on that.”
She thanked the GMB team, continuing: “I just want to say thank you to all of you for being absolutely brilliant since I’ve come back through challenging times
“Everybody here, you and Ben and Adil and all the people on and off-screen, you’ve been amazing.”
Good Morning Britain airs weekdays from 6am on ITV.