File photo dated 23/12/02 of The Duke of Edinburgh during a visit to a clay pigeon shooting competition organised by the British Association of Shooting and Conservation on the royal Sandringham Estate. The Queen privately owns Sandringham House and its vast surrounding estate, which includes 16,000 acres of farmland, 3,500 acres of woodland and 150 properties. Philip took on overall responsibility for the management of the estate at the start of the Queen's reign in 1952. He concentrated on maintaining it for future generations, ensuring conservation was at the heart of the way it was run. The Duke of Edinburgh spent much of his retirement at Wood Farm on the Sandringham estate. Issue date: Friday April 9, 2021.