His Royal Highness The Prince Philip, passed away peacefully this morning at Windsor Castle.
The Royal Family issued the statement on Twitter just after 12pm.
In the statement it said: “It is with deep sorrow that Her Majesty The Queen has announced the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh. His Royal Highness passed away peacefully this morning at Windsor Castle.”
Following his death, East Sussex MPs paid their tributes.
Eastbourne MP Caroline Ansell said: “Very sad to see the news that Prince Philip passed away this morning. My deepest condolences to Her Majesty the Queen and the Royal Family on a loss which will be felt so keenly. For 69 years Prince Philip supported the Queen in her unstinting duty to our country.”
Hastings and Rye MP Sally-Ann Hart added: “HRH The Duke of Edinburgh, was a remarkable man, a true patriot, who served his country in war and peace for many decades.
“His was a life devoted to service, duty, the country and Commonwealth, and in supporting her Majesty The Queen as the longest serving Consort to a Monarch.
“As a nation we have been blessed and honoured to have such a servant of the British people and the Commonwealth. His was a life lived to the fullest, providing Her Majesty and the country with the support, devotion and good humour that was always needed.
“My thoughts are with Her Majesty The Queen, the Royal Family and the British people as we come together as a nation to mourn. May HRH The Prince Philip, The Duke of Edinburgh, rest in peace.”
Lewes MP Maria Caulfield said: “Such sad news on the death of HRH, the Duke of Edinburgh. He devoted his life to the Queen, his family and our country. Thoughts and prayers with Her Majesty and the Royal Family.”
While Nus Ghani, MP for Wealden, added: “Such sad news to hear of the death of Duke of Edinburgh.
“I had the pleasure of meeting his Royal Highness and he was always charming with a hint of mischief. My thoughts and prayers are with Her Majesty The Queen.”
Bexhill and Battle MP Huw Merriman said: “So very sad to hear of Prince Philip’s passing. He was a truly great man who served and loved this country, supporting our Queen and so many charitable causes until so late in his life. He will be dearly missed.
“My most sincere thoughts and condolences are with our magnificent Queen.”
The Union flag at County Hall, Lewes, was lowered to half-mast after the news of Prince Philip’s death was announced.
An East Sussex County Council spokesperson said: “Expressions of sympathy and appreciation have been shared around the globe and the Chairman of the County Council is writing to HM The Queen to express his sincere condolences at the death of HRH The Duke of Edinburgh.
“Since their marriage in November 1947, HRH The Duke of Edinburgh has been a constant support and companion to HM The Queen and has touched the hearts of many in East Sussex.
“The Union flag at County Hall, Lewes has been lowered to half-mast.”
The Duke of Edinburgh was 99-years-old and was due to celebrate his 100th birthday on June 10.
Prince Philip had spent recent months in hospital. He was first taken in to King Edward VII’s Hospital on February 16 as a precaution after feeling unwell. He was then transferred to St Bartholomew’s Hospital for continued treatment for a heart condition, before going back to King Edward VII’s Hospital. He only left the hospital on March 16.
Prince Philip was the longest-serving consort in British history. The duke and the Queen were married for more than 70 years and Philip dedicated decades of his life to royal duty, serving the nation at the monarch’s side