Queen Elizabeth II has died at the age of 96, Buckingham Palace has confirmed.
Her majesty has reigned for over 70 years, outlasting 12 Prime Ministers and 14 Presidents.
The Queen, 96, celebrated her Platinum Jubilee this year but there have been longstanding concerns over her health and mobility.
What happens to sport in the UK after the Queen dies?
The planning around the Queen's death is known as Operation London Bridge and it is a hugely detailed plan that is put in place from the moment she passes away.
And there are implications to UK sporting events.
The Premier League will be led by the DCMS (Department for Culture, Media and Sport) guidance but footballing fixtures during the weekend of her tragic passing are almost certain to be scrapped. This includes the English top-flight, EFL, SPL, and Irish and Welsh league games with fixtures postponed - this is expected to be replicated to semi-pro and amateur sporting events.
There also also confirmed protocols in place around horse racing and cricket. Royal Ascot is expected to be scrapped.
The Marylebone Cricket Club is said to hold insurance for a similar outcome.. After the death of George VI in 1952, rugby and hockey fixtures were called off, while football matches went ahead. Fans sang Abide With Me and the national anthem before kick off at matches.
All games, including golf, will be banned in the Royal Parks.
What happens in the country after the Queen dies?
Prince Charles becomes King and he will address the nation in a televised broadcast, usually on the day after a passing.
The Prime Minister, Liz Truss, will hold an audience with Charles, while the Ministry of Defence will organise gun salutes and a minute of silence will be held across the country.
Her death triggers an official 12-day period of national mourning with all Union flags flown at half mast.
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