The Duke of Edinburgh has been admitted to hospital after feeling unwell, Buckingham Palace said.



Prince Philip, 99, was admitted on the advice of his doctor and a palace statement said it was a precautionary measure.



The statement said: “His Royal Highness the Duke of Edinburgh was admitted to the King Edward VII hospital in London, on Tuesday evening.



“The duke’s admission is a precautionary measure, on the advice of [his] doctor, after feeling unwell. The duke is expected to remain in hospital for a few days of observation and rest.”



Philip, who was said to be in good spirits was said to have walked into the hospital unaided. A source said the illness was not Covid-related and the stay in hospital was purely precautionary.



A Buckingham Palace spokesperson said the 99-year-old is “expected to remain in hospital for a few days of observation and rest”.



A spokesman for the prime minister, Boris Johnson, said: “The PM sends his best wishes to the Duke of Edinburgh as he undergoes a few days of rest in hospital.”



The Queen and Philip, who celebrated their 73rd wedding anniversary in November, received their Covid-19 vaccinations in January.