King Charles has been pictured at work for the first time since announcing his cancer diagnosis earlier this month.

The 75-year-old met with Prime Minister Rishi Sunak and a Privy Council on Wednesday afternoon (February 21) at Buckingham Palace, marking the restart of their weekly encounters to discuss matters of government.

Charles, who was wearing a suit and tie, was seen shaking hands warmly with Mr Sunak, and greeting him with a broad smile.

Mr Sunak told the King “the whole country” was behind him, while the monarch spoke of being reduced to tears by the kindness of the messages and cards he had received.

PM Rishi Sunak tells King Charles ‘the country is all behind you’ following cancer diagnosis

Mr Sunak said: “Good evening Your Majesty. Very nice to see you.”

The King replied: “A gap”.

Mr Sunak said: “A bit. Wonderful to see you looking so well.”

Charles joked: “It’s all done by mirrors”, prompting hearty laughter from Mr Sunak.

The Prime Minister added: “We’re all behind you. The country is all behind you.”

Charles replied: “I’ve had so many wonderful messages and cards. It’s reduced me to tears most of time.”

Mr Sunak said: “Well I can imagine.”

Glasgow Times: The 75-year-old met with Prime Minister Rishi Sunak and a Privy Council on Wednesday afternoon The 75-year-old met with Prime Minister Rishi Sunak and a Privy Council on Wednesday afternoon (Image: Jonathan Brady/PA)

They discussed the spotlight that has been shone on cancer charities, with the King describing the organisations as “wonderful”.

Charles, who has been dealing with his red boxes of state papers behind the scenes, started outpatient treatment for an undisclosed form of cancer just over two weeks ago.

He had been staying at Sandringham, in Norfolk after his first round of cancer treatment in London.

A statement previously released by Buckingham Palace said: “During The King’s recent hospital procedure for benign prostate enlargement, a separate issue of concern was noted.

“Subsequent diagnostic tests have identified a form of cancer.

“His Majesty has today commenced a schedule of regular treatments, during which time he has been advised by doctors to postpone public-facing duties.

“Throughout this period, His Majesty will continue to undertake State business and official paperwork as usual.

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“The King is grateful to his medical team for their swift intervention, which was made possible thanks to his recent hospital procedure.

“He remains wholly positive about his treatment and looks forward to returning to full public duty as soon as possible.

“His Majesty has chosen to share his diagnosis to prevent speculation and in the hope it may assist public understanding for all those around the world who are affected by cancer.”