Charles breaks his silence over cancer diagnosis: King offers his ‘most heartfelt thanks’ to the British public for messages of support and says he is ‘heartened’ to hear his experience is inspiring others to get checked

King Charles has broken his silence on his cancer diagnosis and offered his ‘heartfelt thanks’ to the British public in a letter today.

It was discovered by doctors when the monarch, 75, was treated for an enlarged prostate and announced on Monday, but his specific diagnosis remains unknown.

The royal has been based in Sandringham since leaving the London Clinic, in the capital, where he stayed for three nights and left on January 29.

The letter, released today, features bold red Sandringham House letterhead and is signed ‘Charles R’.

It reads: ‘I would like to express my heartfelt thanks for the many messages of support and good wishes that I have received in recent days.

King Charles has broken his silence on his cancer diagnosis and offered his 'heartfelt thanks' to the British public

King Charles has broken his silence on his cancer diagnosis and offered his ‘heartfelt thanks’ to the British public

The royal has been based in Sandringham since leaving the London Clinic, in the capital, where he stayed for three nights and left on January 29.

The royal has been based in Sandringham since leaving the London Clinic, in the capital, where he stayed for three nights and left on January 29.

‘As anyone affected by cancer will know, such kind thoughts are the greatest comfort and encouragement.

‘It is equally encouraging to hear how sharing my own diagnosis has helped to promote public understanding and shine a light on the work of all those organizations that support cancer patients and their families across the UK and the world.

‘My lifelong admiration for their tireless care and commitment is all the greater because of my own personal experience.’

The king is also believed to hold face-to-face meetings in London next week despite his ongoing cancer treatment.

He will spend a day or so in the capital as his trip is likely to overlap with his medical appointments.

But the king is good enough to hold a limited number of face-to-face meetings, sources say.

The letter comes after he was visited by his estranged son, Prince Harry, 39, following the shock announcement on Tuesday.

The Duke, 39, flew to London on a ten-hour commercial British Airways flight from Los Angeles to Heathrow on Tuesday, arriving at the royal residence at 2.42pm.

He then spent about 45 minutes chatting with his father, believed to be their first proper contact in 15 months.

It was their first formal meeting in person since the late Queen Elizabeth II’s funeral in September 2022.

The father and son had a ‘brief meeting’ before the King and Camilla were driven to Buckingham Palace where a helicopter was waiting to take them back to Sandringham.

Prince William resumed regular duties this week following the King's cancer diagnosis

Prince William resumed regular duties this week following the King’s cancer diagnosis

The heir to the throne took time off to support his family after the Princess of Wales underwent planned abdominal surgery

The heir to the throne took time off to support his family after the Princess of Wales underwent planned abdominal surgery

The King's helicopter is seen landing at Buckingham Palace, London following the announcement of King Charles III's cancer diagnosis

The King’s helicopter is seen landing at Buckingham Palace, London following the announcement of King Charles III’s cancer diagnosis

For his trip back to the States, Harry was spotted in Heathrow’s exclusive Windsor Suite as he prepared to fly back that afternoon.

The royal is not believed to have seen his estranged brother and heir to the throne Prince William, or sister-in-law Kate.

Meanwhile, Meghan Markle was pictured smiling as she drove her Range Rover near her $14 million Montecito home just hours before Prince Harry returned home.

Harry is expected to return to Britain in May for a service at St Paul’s Cathedral to mark the tenth anniversary of the Invictus Games.

The heir to the throne, 41, has carried out some duties but a source said William’s priority was ‘supporting his wife and family’.

He presented an investiture ceremony at Windsor Castle Wednesday before attending the Londons Air Ambulance charity gala dinner later that evening.

Entering the venue, the Prince of Wales said he ‘really appreciates everyone’s kindness’ to speak for the first time since the shock news of the King’s health.

His wife, the Princess of Wales (42), is recovering from abdominal surgery and is on extended leave.

Kate, 42, is recovering and joined her husband and their three children, Prince George, Princess Charlotte and Prince Louis, on a half-term holiday at the Sandringham estate in Norfolk, Richard Eden reported.

A friend told Eden: ‘Catherine is recovering well.

“She was looking forward to a change of scene and will be able to take it easy in Norfolk while the children blow off steam with William.”

The royal was discharged from the London Clinic 12 days ago.

It is believed that the royal has not seen his estranged brother and heir to the throne Prince William

It is believed that the royal has not seen his estranged brother and heir to the throne Prince William

Meghan Markle was pictured beaming as she was snapped driving near her $14 million Montecito home just hours before Prince Harry returned home

Meghan Markle was pictured beaming as she was snapped driving near her $14 million Montecito home just hours before Prince Harry returned home

Harry did not see his estranged brother and heir to the throne Prince William, or sister-in-law Kate, who is recovering from abdominal surgery and on extended leave

Harry did not see his estranged brother and heir to the throne Prince William, or sister-in-law Kate, who is recovering from abdominal surgery and on extended leave

Kate, 42, is recovering and joined her husband and their three children Prince George, Princess Charlotte and Prince Louis on a half-term holiday at the Sandringham estate

Kate, 42, is recovering and joined her husband and their three children Prince George, Princess Charlotte and Prince Louis on a half-term holiday at the Sandringham estate

The heir to the throne has no further duties scheduled this week as he continues to put his wife and children first.

A source told the USA Online Post earlier this week: ‘The prince has always made it clear that his priority is to support his wife and family for now – and he hasn’t put a timescale on that.

“He will return to duty on Wednesday, but you shouldn’t expect to see him again for a while after that.”

William is understood to have his father’s ‘100 per cent’ support to return at his own pace.

A source said: ‘The King adores Catherine and thinks she is doing a wonderful job. He understands family comes first.’

Queen Camilla also broke her silence on her husband’s diagnosis during her first public engagement since the announcement.

The 76-year-old took a five-hour drive from her husband’s side at Sandringham to Wiltshire after the local helipad flooded.

She made the comments as she arrived at Salisbury Cathedral for a night of music for charity.

On Thursday, Ben Abbott, 40, a critical care paramedic for Wiltshire Air Ambulance, said: ‘I hope his majesty is well, we are all really saddened to hear the news.’

Camilla then replied: ‘He’s doing very well under the circumstances.

‘He was very touched by all the letters and messages sent by the public from all over. It’s a lot of cheering.’