His absence following his paedophile brother’s recent court case has added to the strain.
A source said: “Holly adores This Morning and for the first time in 14 years she has made it clear that should Phil ever leave she would want to stay. They are separate entities.
“To those around them on set, it has become clear recently that Holly and Phil are not as close as they once were.
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“Professionally you would have no idea there was anything going on because on camera they are acting exactly the same.
“But behind the scenes their relationship has cooled.
“Before there would be a lot of banter and camaraderie off camera but that has dwindled.”