Prince Philip was taken to the King Edward VII Hospital in Marylebone, London, as a 'precautionary measure'
The 99-year-old's illness is not Covid-related and decision to admit him was taken with 'abundance' of caution
Royal author Penny Junor said Prince Philip would be 'outspoken' if he felt people were making a fuss of him
Royal sources say that he remains in 'good spirits' and that the Queen has stayed at home at Windsor Castle
Her Majesty pressed ahead with her duties yesterday by receiving Royal Naval update from the First Sea Lord
It comes after it was announced on January 9 that the royal couple had received their first doses of Covid jab