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.


Status of US-Iran talks uncertain as ship struck in Hormuz
Russia says Ukrainian drone attack on holidaymakers killed seven
India's Gen Z cockroach party resists lure of election after rattling Modi
Wildfires ease in Greece as people return to gutted homes
Treatment trials for Ebola strain behind Congo outbreak show promise, WHO says
