His Royal Highness The Prince Philip, Duke of Edinburgh, Earl of Merioneth, Baron Greenwich of Greenwich in the County of London, Lord High Admiral of the United Kingdom, has died just shy of his 100th birthday:
A statement issued by the palace just after midday spoke of the Queen's "deep sorrow" following his death at Windsor Castle on Friday morning.
The Duke of Edinburgh, the longest-serving royal consort in British history, was at the Queen's side for more than her six decades of reign.
The BBC's royal correspondent Nicholas Witchell said it was "a moment of sadness" for the country and "most particularly, for the Queen losing her husband of 73 years - a bigger span of years than most of us can imagine".
He said Prince Philip had made "a huge contribution to the success of the Queen's reign", describing the duke as "utterly loyal in his belief in the importance of the role that the Queen was fulfilling - and in his duty to support her".
The Duke would have turned 100 on June 10th. Prince Charles became the new Duke of Edinburgh upon his father's death. The title will revert to the Crown when Charles becomes King.