The Accession Council met at St James’s Palace for the proclamation of the King, an ancient tradition dating back hundreds of years.
“God Save The King” rang out from the Privy Council before the new Prince of Wales was the first to sign the proclamation.
Camilla, Queen Consort was the second to sign.
On Friday evening, the Archbishop of York, Stephen Cottrell, said it was a “huge honour” to be among the group of eight signatories to the proclamation.
The ceremony did not make King Charles III a monarch – it happened automatically at the time of the Queen’s death – and goes back to the days before the mass media, when proclamations were the way to let the public that there was a new monarch.
Proclamations will follow across the country, including in Leeds on Sunday at 12.45pm at Leeds Town Hall and in Scarborough on Sunday at 4pm.
Broadcast cameras were allowed into the historic event, giving the world a first glimpse of a centuries-old ceremony – and one of the first convention changes initiated by the new king.
More than 200 privy councilors – a group of mostly former and current politicians, some members of the monarchy and other national figures – were present to hear the Clerk of the Council read the membership proclamation.
The six living prime ministers – Truss, Johnson, May, Cameron, Brown and Blair – were all present.
The king said he began by carrying out the “painful duty” of announcing the death of his “beloved mother”, and told the council: “I know how much you, the whole nation – and I think that I can tell the whole world – sympathize with me in the irreparable loss we have all suffered.
“It is the greatest consolation to me to know of the sympathy expressed by so many to my sister and brothers and that such overwhelming affection and support must be extended to our entire family in our loss.”
He spoke of the late Queen’s “selfless service”, adding: “My mother’s reign was unequaled in its duration, devotion and devotion. Even when we weep, we give thanks for this most faithful life.
The King has approved an ordinance that the day of the Queen’s funeral will be a public holiday.
On a balcony above Friary Court in St James’s Palace, David White – a civil servant known as the Garter King of Arms – read the proclamation.
He ended by saying: “Given at the Palais Saint-Jacques this September 10 of the year of grace 2022.”
In the moments that followed, “God save the King” was shouted.
The anthem was later performed by The Band of the Coldstream Guards alongside eight Household Cavalry State Trumpeters.
They were accompanied by St James’s Palace Detachment of the King’s Guard consisting of Coldstream Guards of Number 7 Company.
Salutes of arms rang out at stations such as the Tower of London and Hyde Park both at home and abroad on Saturday to mark the accession of King Charles III.
Sixty-two rounds were fired near Tower Bridge beside the River Thames by the Honorable Artillery Company (HAC) and 41 rounds beside Park Lane by the King’s Troop Royal Horse Artillery (RHA).
Salutes were also fired from Cardiff Castle, Edinburgh Castle, Gibraltar, Colchester, York, Larkhill near Stonehenge, Devonport and Portsmouth naval bases and a number of stations at sea .
The King will spend the rest of Saturday meeting leaders including the Archbishop of Canterbury, Prime Minister Liz Truss and Cabinet, and Labor leader Keir Starmer.