Prince Philip has been admitted to hospital

The Duke of Edinburgh has been taken to hospital after feeling "unwell."

According to Buckingham Palace, the 99-year-old was taken to the King Edward VII Hospital in London on Tuesday evening.

The palace said in a statement Philip was admitted on the advice of his doctor as 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 Royal Highness’s doctor, after feeling unwell. The duke is expected to remain in hospital for a few days of observation and rest."

Philip, who is said to be in good spirits, travelled by car to the hospital and it was not an emergency admission.

He is said to have walked into the hospital unaided.

A source said the illness was not Covid-related.

The Queen remains at Windsor, where she has been since Christmas.

The last few years haven't been easy for Philip, who retired from public life in 2017 after 65 years of supporting the queen.

Philip - who will celebrate his 100th birthday on 10 June - has suffered several bouts of poor health and spent four days in hospital in December 2019.