Buckingham Palace has confirmed that King Charles III's Proclamation at the Accession Council will take place on Saturday, 10am, in the State Apartments on St James's Palace.
The proclamation is a public announcement of the accession of the new monarch, and will happen multiple times. Following the first, a second Proclamation will be read in the City of London at the Royal Exchange around midday on the same day as the first Proclamation. Further Proclamations will be read in Scotland, Northern Ireland, and Wales at midday on Sunday, September 11.
In recognition of the new sovereign, flags will be flown at full-mast from the time of the Principal Proclamation until one hour after the Proclamations in Scotland, Northern Ireland, and Wales, after which flags will return to half-mast in mourning for the death of Queen Elizabeth II.