King Charles III's official monogram has been revealed for the first time and is set to be a common sight across Britain in the coming years.
And four stamps featuring portraits of Queen Elizabeth II ― the first set to be approved by her succcessor — will be released in her memory on November 10.
Royal cyphers are a symbol of the monarch and are displayed on a variety of government buildings, official documents and police officers' uniforms.
They are often associated with the Royal Mail's famous red post boxes and are useful for identifying the reigning monarch of the era.
The new cypher features the king’s initial “C” intertwined with the letter “R” for Rex — Latin for king — with “III” within the R to represent King Charles III, and the crown above the letters.
Queen Elizabeth's cypher — “EIIR” — was below an image of the St Edward's Crown.
The cypher and stamps were unveiled as the royal period of mourning for Queen Elizabeth II ended, marking seven days since the late monarch's funeral in Westminster Abbey. Flags at royal residences will remain at half-mast until 8am on Tuesday.
The new stamps will feature images of the late monarch through the years.
A photograph taken by Dorothy Wilding in 1952 to mark her coronation features on second-class stamps.
The first-class stamp shows a photo taken by Cecil Beaton in 1968, in which the monarch is standing in her admiral's cloak with her head tilted to the left.
A portrait taken in November 1984 by Yousuf Karsh will appear on £1.85 stamps, and a photo taken by Tim Graham in 1996 while the Queen attended a banquet at Prague Castle during her visit to the Czech Republic will be the image on the £2.55 stamps.
"Today we are unveiling these stamps, the first to be approved by his majesty the king, in tribute to a woman whose commitment to public service and duty was unparalleled in the history of this country," said Royal Mail chief executive Simon Thompson.
The UK's new monarch travelled to Scotland soon after the queen’s funeral last Monday, with the period of royal mourning lasting for seven days after the queen’s burial.
The monogram is King Charles’s personal property and was selected by him from a series of designs prepared by the College of Arms.
A Scottish version features the Scottish crown, and was approved by Lord Lyon King of Arms.
It will be used by government departments and by the royal household for franking mail. The decision to replace cyphers will be at the discretion of individual organisations.
The process is likely to be a gradual one and in some instances the cyphers of previous monarchs can still be seen on public buildings and street furniture, especially post boxes.
The College of Arms, which designed the cyphers, was founded in 1484 and is responsible for creating and maintaining official registers of coats of arms and pedigrees.
The heralds who make up the college are members of the royal household and act under Crown authority.
Queen Elizabeth II's funeral: extraordinary images from an extraordinary day — in pictures
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King Charles III follows behind the coffin of Queen Elizabeth II, draped in the Royal Standard with the Imperial State Crown and the Sovereign's orb and sceptre on top, as it is carried out of Westminster Abbey after her state funeral. Reuters -
The ceremonial procession of the coffin of Queen Elizabeth travels down the Long Walk as it arrives at Windsor Castle for the Committal Service at St George's Chapel. AP -
Pall bearers carry the coffin into St. George's Chapel, in Windsor. AP -
A Royal Guard stands by floral tributes at Windsor Castle. AFP -
The coffin of Queen Elizabeth is pulled on a gun carriage by Royal Navy sailors to Westminster Abbey. Getty Images -
Prince William and Prince Harry follow the coffin of the queen after her state funeral in Westminster Abbey. AP -
Emma, the monarch's fell pony, stands as Queen Elizabeth's coffin passes at Windsor Castle. PA -
Members of the royal household stand with Queen Elizabeth's Corgis, Muick and Sandy, as they await the funeral cortege at St. George's Chapel, Windsor. AP -
Catherine, Princess of Wales, attends the state funeral service in London. AFP -
The coffin of Queen Elizabeth is pulled along The Mall following her funeral service in Westminster Abbey. AP -
Flowers thrown by the public lie on the hearse carrying the coffin as it arrives at Windsor Castle. AP -
King Charles at the state funeral in London. Reuters -
People sleep before the funeral service at Westminster Abbey. AFP -
A giant screen honouring the late queen at Piccadilly Circus in London. EPA -
King Charles looks towards the coffin of his mother at Westminster Abbey. Getty Images -
Meghan, Duchess of Sussex, sitting in a car as a British flag is reflected in its window. AFP -
Buckingham Palace household staff return through the gates of the palace after paying their respects. AFP -
Staff Sergeant Yeoman Darren Fowler, right, and Captain Rebecca Cooper from the Royal Signals at the Elizabeth Tower, checking that Big Ben Chimes in time with gunfire during the state funeral procession. EPA -
King Charles salutes as he is driven past Wellington Arch in London. Getty Images -
The London skyline is seen as the procession moves down The Mall. Getty Images -
The coffin of the queen is pulled on a gun carriage by Royal Navy sailors from Westminster Abbey. Getty Images -
Princess Charlotte arrives by car ahead of the funeral in central London. AP -
The coffin is carried into St George's Chapel for the Committal Service, in Windsor Castle. AP -
A woman cries in London's Hyde Park while watching the funeral service. AP -
Prince George looks towards his father Prince William during the Committal Service at St George's Chapel. Getty Images -
Queen Elizabeth's coffin is driven along the Long Walk towards Windsor Castle. Reuters -
People waiting along the route that the coffin will be pulled on a gun carriage in central London. AP -
King Charles and the Queen Consort Camilla follow the coffin at St George's Chapel. AP -
The Royal State Hearse arrives at Windsor Castle. Getty Images -
King Charles follows the State Gun Carriage as it carries the coffin at Westminster Abbey. PA -
Members of the public gather to see the coffin as it travels from Westminster Abbey to Wellington Arch in London. Getty Images -
King Charles and members of the royal family follow behind the coffin as it is carried into Westminster Abbey. PA -
The Imperial State Crown resting on the coffin. Getty Images -
The hearse transporting the coffin is covered in flowers thrown by the public. AFP -
The Bearer Party of The Queen's Company, 1st Battalion Grenadier Guards carries the coffin from Westminster Abbey. AFP
