Prince William has “not updated” his monogram to reflect his Royal Family promotion, as a “mistake” was spotted on Tuesday.

The Prince of Wales, 41, visited Wales on June 11 to learn more about seaweed innovation, travelling to Cardiff by train.

In a photo shared on social media, William looked out the window with his phone and a red binder on the table in front of him.

The binder showed his royal monogram, a “W” topped by a coronet.

Prince William

Prince William’s monogram appeared to show a mistake

X / Kensington Royal

However, Prince William’s royal cypher has not been updated to reflect his new status as heir apparent.

Gert’s Royals pointed out William’s symbol, which he routinely uses on stationary and other official documents, still features the coronet of a child of the Prince of Wales.

Before King Charles, 75, named Prince William and Princess Kate as the new Prince and Princess of Wales one day after Queen Elizabeth II’s death in September 2022, the monarch held the title of the Prince of Wales as heir.

Charles was the longest-serving heir apparent in British history due to his mother’s historic 70-year reign.

Prince William

​Prince William posed for a candid photograph en route to Cardiff, Wales

X / Kensington Royal

King Charles debuted his new royal cypher just weeks after his accession.

The monogram shows the crown above his first initial “C” intertwined with an “R” for Rex (Latin for King), with the “III” Roman Numerals inside the “R”.

The King’s monogram, which he chose from several created by the Palace’s heraldry experts at the College of Arms, gradually replaced Queen Elizabeth’s “ERII” insignia on state documents, mail, post boxes, uniforms, government buildings and more.

Queen Camilla unveiled her new cypher in November 2022, incorporating her first initial, “C” with an “R” for Regina (Latin for Queen).

Prince William

Prince William visited the ZERO2FIVE Food Industry Centre in Cardiff


Prince William

Prince William celebrated the seaweed industry and food innovation in Wales


Last week, Prince William represented his father, who is undergoing cancer treatment, at the international commemorative ceremony in Normandy, France, on the 80th anniversary of the D-Day Landings.

William joined over 25 heads of state, fellow European royals and veterans from around the world at the key ceremony to remember the sacrifices made on June 6, 1944.

Members of the Royal Family will gather in London this weekend for Trooping the Colour, the annual celebration and parade publicly marking the monarch’s birthday.

This will be the second time the event will honour King Charles since his accession.