By Melissa Davies
Prince Phillip has been taken to hospital with his third health scare in recent months.
He has been struck with a bladder infection for a second time and is expected to remain in hospital for at least a few days.
The Duke of Edinburgh has had a demanding schedule over the past few months with the jubilee tour, the Olympics and most recently a trip to the Isle of Wight.
Many close to the palace say he is overdoing it and perhaps he needs to step back and consider retirement.
When the Duke of Edinburgh visited the Isle of Wight just a few days ago there was no sign the 91-year-old was in any pain.
But after flying back to Balmoral in Scotland the Duke's health quickly deteriorated and he was taken by ambulance to Aberdeen Royal Infirmary.
It's understood he's there just as a precautionary measure but those precautions are becoming more frequent.
The first scare was on Christmas Eve when he spent five nights in hospital with a blocked coronary artery.
Then in June after a long, freezing cold day on the Thames for the Queen's diamond jubilee regatta, the Duke came down with a bladder infection and his family seemed worried about his health.
It's understood Prince Phillip is reluctant to make a fuss - joking when asked after his last hospitalisation if he was feeling better, he replied "I wouldn't be coming out if I wasn't."
He and the queen are meant to be on their summer holiday at Balmoral but they are still hosting events and taking trips for public engagements.
Observers expressed concern about couple's gruelling schedule.
Following chest pains at Christmas, Prince Phillip has a doctor travelling with him full-time and has had a lift installed at Sandringham. But the problem is he refuses to use it.
Perhaps his family will demand it now - Prince Charles, Camilla and the Queen are currently at Balmoral and are expected to visit him over next few days.
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