Philip walking back to fitness.
The 90-year-old is determined to be at his wife's side on her Diamond Jubilee tour, so he's begun a exercise regime to convince her he is fit enough.
Insiders say the Queen, who's 85, wants him to scale down duties after his Christmas heart op. But the Duke of Edinburgh is adamant he won't miss a single event.
A source said: "He was back walking days after the operation and is now up to two miles a day, marching out at a brisk pace. He is also got a regime of press-ups and sit-ups.
"It's far more than most people half his age do but for a 90-year-old on the back of heart surgery it's astonishing."
TWO-MILES A DAY: The DukePhilip