The London Evening Standard is reporting that Prince Philip, who is about to celebrate the longest marriage to a reigning Monarch, has a secret heart condition. He has suffered from it for the past 15 years.

Prince Philip (left) at the Highland Games this summer
The Prince, who is 86, suffered a bout of ill-health recently which caused much concern in the Royal Family. However, he has insisted on carrying out his busy schedule of Royal engagements.
The Palace has apparently brought forward the task of preparing Prince William and Prince Harry for their future official roles.
An aide told the paper, “Prince Philip in particular is acutely aware of the need to prepare for the future”.
The Duke “has to take medication regularly and his bodyguards and aides are on constant alert to take him to hospital instantly if he becomes dizzy or short of breath”.
An unnamed courtier said, “The Queen and the family have been been concerned about the Duke in recent weeks. He was not feeling himself and given his age and his heart condition, it added to the worry.”
But will he reduce his workload? “Who is going to tell him? To be blunt, the Duke is not somebody you tell what to do.”
On his return from Balmoral, he carried out eight engagements, said to include opening buildings, hosting receptions, lunches dinners and meetings.
Next month he will fly with the Queen, Prince Charles and Camilla to the Commonwealth Heads of Government conference in Uganda. It’s the first time that Charles will accompanying his parents on such a high profile visit.
Other engagements next month include Philip accompanying the Queen on a private visit to Malta, where the couple lived before Elizabeth became Queen. There is also their Diamond Wedding service at Westminster Abbey and a party arranged by William and Harry.
A senior official commented, “The Duke of Edinburgh has lived with a heart condition for years for which he takes medication. Those who work close to him are informed of the symptoms and if he shows any sign of them he is to be taken straight to see a specialist. He has regular check ups but recently there has been some concern as he was feeling unwell. The concern is due, primarily, to his age.”
Three years ago, when he suffered bruising to his face after slipping in the bath, he reportedly told a journalist in typical fashion, “Do I look bloody ill.”