“His Royal Highness passed away peacefully this morning at Windsor Castle.”
The duke was married to Queen Elizabeth II for more than 70 years and became the longest-serving consort in British history – he was due to turn 100 in two months’ time, on 10 June.
His cause of death has not yet been announced.
Philip had returned to Windsor Castle on 16 March after spending nearly a month in hospital – his longest ever stay.
He initially received care for an infection but then underwent a heart procedure for a pre-existing condition.
While he was at King Edward VII hospital, he was visited by his eldest son Charles, the Prince of Wales, who made a 200-mile round trip to see his father.
Into his 90s, the Duke carried out a busy programme of public engagements, reflecting his own charitable interests.
He also travelled around the country supporting the Queen, both on state occasions and royal visits.
For a man of his age he enjoyed relatively good health.
He was taken to hospital over Christmas in 2011 for treatment for a blocked artery.
In 2012 he was admitted to hospital during the Queen’s Diamond Jubilee with a bladder infection, and in 2013 had an exploratory operation on his abdomen.
But it was not until May 2017, after carrying out more than 20,000 solo public engagements, that the 96-year-old retired from his own programme of royal duties, occasionally stepping out to support the Queen for big events.
No official details have been released yet about the Duke’s funeral, but it is understood he will be given a royal ceremonial funeral rather than a state funeral, in line with his wishes.
The Queen will sign off the final plans in the coming days.
Prince Philip of Greece and Denmark was born on the island of Corfu in 1921.
At the age of 18, the prince joined the Royal Navy as a cadet.
He saw active service during the Second World War, serving in the Indian Ocean and the Mediterranean, and was mentioned in despatches for his bravery.
In 1947 he renounced his Greek and Danish royal titles, took on the surname of Mountbatten and became a naturalised British subject ahead of his marriage to Princess Elizabeth.
Their wedding was the first great state occasion after the end of the Second World War.
His commitment to the Queen was unfaltering. He gave up his career in the Navy in order to support her in her role as monarch.
The Queen has described Prince Philip as her “constant strength and stay”.
They had four children – Charles, Anne, Andrew and Edward – and he was a much loved grandfather and great-grandfather.
He saw himself as a moderniser within the British monarchy, orchestrating the first royal walkabout – but he was also known for his forthright views and off-the-cuff remarks.
Prince Philip’s concern for young people inspired him to create the Duke of Edinburgh’s Award Scheme, and he supported more than 800 charities and good causes – focusing on his interests in wildlife conservation, technology and sport.
Since the 1940s Prince Philip was an ever present figure in the life of the UK and leaves behind his own considerable legacy.