Britain's Prince Philip poses for a photograph in St George's Chapel, Windsor Castle, near London, England. File photo/AP
Britain's Prince Philip, the 98-year-old husband of Queen Elizabeth, was taken to hospital on Friday as a precaution for treatment of an existing condition, Buckingham Palace said.
Philip, whose official title is the Duke of Edinburgh, travelled from the royal family's Sandringham home in Norfolk, eastern England, to the King Edward VII Hospital in London for observation and treatment, the palace said in a statement.
"The admission is a precautionary measure, on the advice of His Royal Highness’ Doctor," it said.
A royal source said it was not an emergency admission and that the prince had been able to walk into the hospital.
Philip, who has been at his wife's side throughout her record-breaking 67 years on the throne, retired from public life in August 2017 although he has occasionally appeared at official engagements since.
He has not been seen in public since the wedding of Elizabeth's first cousin once removed, Gabriella Windsor, in May at Windsor Castle, local media reported.
The outspoken, irascible and intensely private prince, who has a reputation for brusque comments and occasional gaffes, has needed hospital treatment several times in recent years.
In 2011, he spent Christmas in hospital after an operation to clear a blocked artery in his heart and he missed the end of celebrations to mark his wife's 60th year on the throne in 2012 after being hospitalised with a bladder infection.
The Greek-born former naval officer then underwent "an exploratory operation following abdominal investigations" in 2013.
He was admitted to hospital in 2017 for treatment for an infection, also arising from a pre-existing condition, and last year, he had hip-replacement surgery which required a 10-day stay.
In January this year, he escaped unhurt when his Land Rover flipped over after a collision with another car near the Sandringham estate. He then had to give up his driving licence after police gave him a warning for driving without wearing a seat belt two days later.
Elizabeth and Philip, who married at London's Westminster Abbey in 1947, celebrated their 72nd wedding anniversary in November.
Prince Harry on Monday announced the birth of the couple's first — a son who will be seventh in the long line to the British throne.
Meghan, wife of Prince Harry, gave birth in the early hours of Monday morning to a baby boy, Archie, the first mixed race child to be born into a senior position in British royalty in recent history.
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