THE letters ER were the signature, known as a cypher, of Queen Elizabeth II.
After the Queen passed away in September 2022, the royal letters on documents and buildings have changed, but what do they mean?
What did ER stand for?
ER stands for Elizabeth Regina, which is what Queen Elizabeth II used to sign all official documents.
She wasn't given the name Regina at birth but it is Latin for Queen.
It is also sometimes written as E II R which indicates that she was the second queen to be called Elizabeth.
Royals ‘brace for Meg memoir’ after Harry's book ‘to rip Wills & Kate’
ER was the monarch's royal cypher or monogram.
Where is ER used?
ER tends to be seen in many parts of the United Kingdom, mostly on the iconic Royal Mail red post boxes.
It's also on government buildings across the Commonwealth, government papers, and duty stamps.
It can also be found on the clothes of some of the Royal staff, including the trumpeters, as well as navy and army uniforms.
Will ER change now Charles is King?
Each monarch has their own unique cypher.
His Majesty was officially proclaimed King on September 10, 2022, by the Accession Council in a ceremony at St James' Palace.
He signed two official documents which is the first time the world saw CR used instead of ER.
He signed "Charles R", but unlike the Queen, the R doesn't stand for Regina, but for Rex, which is the Latin word for King.
C III R stands for Charles Rex the third.
How did Queen Elizabeth die?
Queen Elizabeth II passed away on September 8, 2022, at the age of 96.
Inside Camilla's £850k 'guilty pleasure' country pad - and Charles 'hates' it
She was the longest reigning monarch in UK history, celebrating her Platinum Jubilee just months before her death.
During her 70 year reign she saw 15 Prime Ministers in power, as well as carrying out 21,000 engagements.
The late Queen passed away at her Scottish estate Balmoral where she spent most of her summers.
She lay in state in St Giles' Cathedral in Edinburgh from September 12-13.
Her body was then flown to London, where it lay in state in Westminster Hall from September 14-19 when as estimated 250,000 people queued to pay their respects.
The funeral took place on September 19, 2022 which was broadcast live around the world on TV, radio and The Royal Family's YouTube channel.
A funeral service was held at Westminster Abbey, followed by a procession to Wellington Arch that featured 3,000 military personnel and was watched by about a million people in London.
King Charles and his siblings Princess Anne, Duke of York and Earl of Wessex marched behind the coffin during the procession.
The Queen was buried in the King George VI Memorial Chapel, next to her father King George VI, mother Queen Elizabeth, and sister Princess Margaret.
Her late husband Prince Philip was moved from the Royal Vault beneath St George’s Chapel to rest next to his wife of 73 years.
Politicians and heads of state from across the globe travelled to attend the funeral.
The Prime Minister at the time - Liz Truss - attended, as well as US President Joe Biden and French President Emmanuel Macron.
A two-minute silence was held across the nation before everyone in attendance stood to sing the first two verses of God Save The King.
King Charles III was crowned following his mother's death, with his coronation taking place on May 6, 2023.
When his mother died, he said it was a "moment of great sadness" for him that would be "deeply felt" around the world.
