Queen's card addressed to 'HRH The Duke of Edinburgh'

A closeup image of the Queen walking into the hospital to visit her husband today appears to show an envelope addressed to "HRH The Duke of Edinburgh".

Prince Philip turned 92 today, four days after undergoing exploratory surgery on his abdomen.

A closeup of the envelope in the hands of the Queen. Credit: PA
The full image of the Queen entering the hospital. Credit: PA