Duke in hospital after chest pains
The Duke of Edinburgh was treated for a blocked coronary artery this evening and a successful "invasive procedure of coronary stenting" was performed, Buckingham Palace said.
Prince Philip, 90, went from Sandringham to the cardiothoracic unit at Papworth Hospital in Cambridge for precautionary checks, a spokeswoman for the palace said. Papworth is Britain's largest hospital specialising in heart and lung surgery.
The Royal Family are spending Christmas at the country retreat in Norfolk.
The Duke, who has enjoyed good health for much of his life, was flown to the hospital by helicopter, Sky News reported.
The Duke would normally have been welcoming guests to the Queen's private home, which is set in 60 acres of gardens, offering the perfect sanctuary for the family's break.
The 90-year-old has shunned the pursuits of typical pensioners, and even as an octogenarian continued to compete in demanding carriage driving competitions.
His most recent illness was an uncharacteristic cold in October that forced him to pull out of an overnight stay in Italy for the launch of the ARC Green Pilgrimage Network.
Arrivals at Sandringham continue into Christmas Eve before the family are due to attend the morning service on Christmas Day at St Mary Magdalene Church on the royal estate. The Duchess of Cambridge is spending her first Christmas as a member of the Royal Family.
According to reports, the Duke was flown to Papworth, but the Palace would not comment on the claim.
It is not known if other members of the Royal Family travelled with Philip or whether he would be kept in overnight.