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
Prince Philip, Duke of Edinburgh when escorting the Queen for the annual State Opening of Parliament, where he walks and sits beside her. Contrary to rumours over the years, the Queen and Duke are said by insiders to have had a strong relationship throughout their marriage, despite the challenges of Elizabeth's reign. The Queen referred to Prince Philip in a speech on the occasion of her Diamond Jubilee in 2012 as her "constant strength and guide". As consort to the Queen, Philip supported his wife in her new duties as sovereign, accompanying her to ceremonies such as the State Opening of Parliament in various countries,