Following the death of Queen Elizabeth II on September 8, her eldest son and former Prince of Wales ascended the throne as King Charles III alongside his Queen Consort, Camilla
King Charles III has now ascended the throne following the death of his mother, Queen Elizabeth II, on September 8.
Her Majesty's funeral was held just 11 days after her death on September 19 and millions of people from around the world tuned in to pay their final respects during the State Funeral at Westminster Abbey and then Committal Service at St George's Chapel in Windsor Castle.
There is a detailed plan in place for every British monarch that is written up long before their death, with the Queen's aptly named 'Operation London Bridge', which included a step-by-step guide from her coffin's lying-in-state to funeral preparations.
But what is the plan called for the death of King Charles III?
Here's everything you need to know.
Her Majesty The Queen had the codename of 'Operation London Bridge' for the arrangements following her death.
The plan included the announcement of her passing, the period of official mourning, and the details for her state funeral.
Operation London Bridge was created as early as the 1960s, just a few years after her coronation, and revised many times in the years before her death in 2022.
The codename for the death of King Charles III is 'Operation Menai Bridge', named after the world's first iron suspension bridge in Anglesey, Wales.
While Charles may have only just become king, plans are already in place for the unfortunate circumstance of his death.
Former royal protection officer Simon Morgan said plans for Operation Menai Bridge will begin sooner rather than later as the king comes to terms with his new role.
"Unfortunately, as of tomorrow morning planning for Operation Menai Bridge will start in earnest," he told Today on September 19.
In King Charles III's first address to the nation on September 9, he said: “Queen Elizabeth’s was a life well-lived, a promise with destiny kept, and she is mourned most deeply in her passing. That promise of lifelong service I renew to you all today.
“As the Queen herself did with such unswerving devotion, I too now solemnly pledge myself, throughout the remaining time God grants me, to uphold the constitutional principles at the heart of our nation.
“And wherever you may live in the United Kingdom, or in the realms and territories across the world, and whatever may be your background or beliefs, I shall endeavour to serve you with loyalty, respect and love, as I have throughout my life."
Operation Menai Bridge is expected to have many similarities to that of Operation London Bridge, with the plan to be detailed in full ahead of his coronation.
As soon as Operation Menai Bridge is underway, William, Prince of Wales, will become king alongside his wife Kate Middleton, who is expected to become Queen Consort.
The new King will then address the nation, much like how his father did on September 9, as the public enters a period of national mourning ahead of the funeral.
Code names for royal deaths were initially introduced to prevent the news of the death leaking to the press before the official announcement.
Using codenames prevented switchboard operators at Buckingham Palace from learning of the news before it was made public.
Although the codenames were introduced to prevent widespread news before an official announcement, plans following the death of a member of the Royal Family are longstanding and the codenames have become common knowledge over the years.
Funeral arrangements for the Queen Mother were codenamed Operation Tay Bridge and the plans were 22 years old by the time she passed at the age of 101 in 2002.
Operation Forth Bridge was the codename for the death of the late Duke of Edinburgh, which saw his funeral take place at St George's Chapel in Windsor and his coffin placed in the Royal Vault.
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