The 98-year-old has been taken to the hospital as a precaution for the treatment of an existing condition.
The Duke of Edinburgh has been admitted to the King Edward VII Hospital in London where he will remain under observation for a few days.
Prince Phillip is said to have walked into the hospital unaided and sources say this is part of a planned visit rather than a sudden admission.
This comes as the Queen arrived at Sandringham, where members of the royal family gather for Christmas every year.


Afghanistan says Pakistani airstrikes kill at least three
New air traffic control failure delays flights at UK airports
Textile factory fire in southern Chinese city of Foshan kills 8
Typhoon approaches eastern Japan, prompts flood and landslide warnings
Australia to seek UN Security Council seat from 2029
