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.


Trump says US and Tehran having 'good, friendly talks'
Israel to allow international force into Gaza, Israeli official says
Russian attacks in eastern Ukraine kill seven, officials say
Saudi Arabia reaffirms right to defend its security against drone attacks
UK's Burnham welcomes Zelenskyy as first foreign visitor
