Prince Philip, 99, begins his 23rd day under care of specialist heart doctors

The Duke of Edinburgh , 99, remains at London
The Duke of Edinburgh , 99, remains at London 's private King Edward VII's Hospital, where he was moved back to on Friday after a procedure on a pre-existing heart condition.

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Prince Philip, 99, begins his 23rd day under care of specialist heart doctors

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Prince Philip, 99, spends second night under observation in hospital