The King has held his inaugural weekly audience with the Prime Minister in person at Buckingham Palace.
The head of state officially met Liz Truss for the third time on Wednesday evening, after meeting her at Buckingham Palace, the day after his mother Queen Elizabeth died, on September 9.
During the meeting, which was partially filmed, King Charles III said the death of his mother was “the moment I have been dreading”.
As she offered her condolences, the King shook her hand and thanked her, saying: “You are very kind for coming – I know how busy you are.”
The King then met the PM again at his Accession Council meeting at St James's Palace several days later.
The King has pledged to stand above politics now that he has succeeded his mother as monarch.
In his first address to the nation in the aftermath of his mother’s passing, he said: “My life will of course change as I take up my new responsibilities.
“It will no longer be possible for me to give so much of my time and energies to the charities and issues for which I care so deeply.
“But I know this important work will go on in the trusted hands of others.
However, royal sources have confessed how there is a strongly held belief that during the weekly audiences with the PM, there will be things on which they might not see eye-to-eye.
Ms Truss advised the King against attending the COP27 meeting in Egypt next month, the global environmental conference he was set to attend and make a keynote speech on the climate emergency.