The Duke of York, Prince Andrew, paid his father Prince Philip a visit in hospital today.
Philip was admitted to the London Clinic a week ago for exploratory abdominal surgery.
Prince Andrew waved to the photographers waiting outside but did not give an update on his father's health.
The Queen visited Prince Philip in hospital as the Palace described him as "comfortable and in good spirits" following an operation.
The Duke of Edinburgh will celebrate his 92nd birthday, as he did Christmas in 2011, in hospital.
Buckingham Palace say they expect him to remain there for up to a fortnight, but did not say what the exploratory operation was for.