The Union Jack flag at Buckingham Palace is flying at half mast following the Duke of Edinburgh’s death this morning.
Philip, 99, 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.
Increased numbers of police officers are patrolling beside the palace gates where small groups of passers-by have also gathered.
Prince Philip died at Windsor Castle weeks after being discharged from a month-long stay in hospital.
The Palace said in a statement: “It is with deep sorrow that Her Majesty The Queen announces 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.
“Further announcements will made in due course.
“The Royal Family join with people around the world in mourning his loss.”
Philip had returned to Windsor Castle on March 16 to be reunited with the Queen after spending a month in hospital – his longest ever stay.
He initially received care for an infection but then underwent heart surgery for a pre-existing condition.
The duke had looked gaunt as he was driven away from King Edward VII’s Hospital in central London, having been pushed in a wheelchair to the waiting car.
Philip – father to the Prince of Wales, the Princess Royal, the Duke of York and the Earl of Wessex – was just two months away from his 100th birthday in June.
