Prince Philip, Duke of Edinburgh said that he would now slow down and reduce his duties, stating that he had "done [his] bit". His wife, the Queen, gave him the title Lord High Admiral for his 90th birthday. While staying at the royal residence at Sandringham, Norfolk, on 23 December 2011, the Duke suffered chest pains and was taken to the cardio-thoracic unit at Papworth Hospital, Cambridgeshire, where he underwent successful coronary angioplasty and stenting. He was discharged on 27 December. On 4 June 2012, during the celebrations in honour of his wife's Diamond Jubilee, Philip was taken from Windsor Castle to the King Edward
Royal Households of the United Kingdom whereas Balmoral Castle and Sandringham House are privately owned and maintained. The unoccupied royal residences (including the Tower of London) are run by the Historic Royal Palaces Agency, which is self-funding. The Royal Household in Scotland includes offices of personal, honorary and state appointments. The Great Officers of the Royal Household are: The Royal Household in Scotland also includes a number of other hereditary and non-hereditary offices: The Keeper of Dumbarton Castle and the Governor of Edinburgh Castle are non-hereditary offices. The Household of the Prince Philip, Duke of Edinburgh provides the administrative support to Prince Philip, Duke of Edinburgh.