Prince William has "doubled down" on his determination to cut estranged brother Harry out of his life.

RadarOnline.com can reveal the Prince of Wales, 43, made no moves to see the U.S.-based Duke, 40, during his trip back to the U.K. last week, in which he saw King Charles , 76, for the first time in 19 months . Article continues below advertisement

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Indeed, the four-day visit has instead made William even more intent to sever ties with his sibling.

An insider said: "William is back at the point where if you mention Prince Harry in his presence he would throw you out of the room.

"He's doubling down."

William’s stance comes as royal expert Tina Brown claimed last week

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