Following the sad news of the Queen's death on Thursday, a predesigned plan known as Operation London Bridge has now been put into place.
This sets out exactly what will happen in the coming days ahead of Her Majesty's funeral - and during the official mourning period. The day of the Queen's death is referred to as D-Day, with the coming days to be referred to as D-Day plus the number of days that have passed since her death.
Today (Friday) is D-Day +1, and plans are already underway.
READ MORE: Everything cancelled or closed following the Queen's death - from shops to football
We can expect our new Prime Minister Liz Truss to hold an audience with Charles before the new King addresses the nation.
There will be a meeting of the Accession Council at 10am tomorrow. The official body includes senior government figures and members of the Privy Council. Charles will be proclaimed King during this meeting.
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The proclamation will be read at St James' Palace and at the Royal Exchange in the City of London. It is likely that the Duchess of Cornwall will be with him and her new title will be revealed. The Queen used the Accession Day of her Platinum Jubilee to share her wish for her daughter-in-law to become Queen Consort.
The House of Commons will sit at noon on Friday for MPs to pay tribute to the Queen in a session due to last until 10pm. There will also be a rare Saturday sitting, where senior MPs will take the oath to King Charles III from 2pm, with tributes continuing again until 10pm.
A number of broadcasters cancelled scheduled programmes on Thursday with regular shows expected to remain suspended throughout today.
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