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
Duke of Edinburgh-class cruiser two more were added to "Duke of Edinburgh" on the forecastle. The ship's foremast was converted to a tripod mast to support the weight of the fire-control director probably added in 1917. "Duke of Edinburgh" and "Black Prince" served in the Channel, Atlantic and Home Fleets before World War I. They were stationed in the Mediterranean when World War I began and participated in the pursuit of the "Goeben" and "Breslau" as part of the 1st Cruiser Squadron, but was ordered not to engage. After the German ships reached Ottoman waters, the ships were sent to the Red Sea in