The duke had just handed over his command of the frigate, Magpie.
“Remembering The Duke of Edinburgh, on what would have been his 100th birthday,” the post on the Prince of Wales and Duchess of Cornwall’s official Instagram account said.
It also included an image of Philip at Windsor in July 2020 after the ceremony to transfer his role as colonel-in-chief of The Rifles to Camilla.
The Earl of Wessex, however, told CNN that his father was “incredibly self-effacing” and probably would not have wanted the hassle of celebrating turning 100.
Edward said: “I don’t think he ever really necessarily wanted to reach his centenary because I just think he thought there would be too much fuss and that wasn’t him, that was just not him at all.”