Cameron Walker has issued a "note of caution" after Buckingham Palace confirmed that The King will be returning to public duties.
In a new statement from Buckingham Palace, the King, 75, is confirmed to be returning to royal duties after being diagnosed with a form of cancer two months ago.
Speaking on GB News Royal correspondent Cameron Walker said: "Clearly this is very positive news.
"I think it's going to be a boost for the monarchy. It's been a terrible few months really, with both the King and the Princess of Wales's cancer diagnosis.
King Charles and Queen Camilla are approaching the anniversary of last year's CoronationMillie Pilkington"But a note of caution here, the King has not been cured of cancer. He is still very much undergoing cancer treatment, according to royal sources, but the King is clearly keen to resume public duties here.
"A few weeks ago, Peter Phillips, his nephew said that The King was incredibly frustrated about how long his cancer treatments and recovery were taking.
"But a Buckingham Palace spokesperson says that doctors are sufficiently pleased with his progress and that is why they have released a statement today."
The full statement released by Buckingham Palace read: "His Majesty The King will shortly return to public-facing duties after a period of treatment and recuperation following his recent cancer diagnosis.
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"This visit will be the first in a number of external engagements His Majesty will undertake in the weeks ahead."
The statement continued: "In addition, The King and Queen will host Their Majesties The Emperor and Empress of Japan for a State Visit in June, at the request of HM Government.
"As the first anniversary of The Coronation approaches, Their Majesties remain deeply grateful for the many kindnesses and good wishes they have received from around the world throughout the joys and challenges of the past year."
A Buckingham Palace spokesperson confirmed: "His Majesty’s treatment programme will continue, but doctors are sufficiently pleased with the progress made so far that The King is now able to resume a number of public-facing duties.
Cameron Walker broke the news to GB News viewers
GB News
"Forthcoming engagements will be adapted where necessary to minimise any risks to His Majesty’s continued recovery."
Regarding how long cancer treatments will continue, the spokesperson added: "It is too early to say, but His Majesty’s medical team are very encouraged by the progress made so far and remain positive about The King’s continued recovery."
The King is understood to be performing public engagements subject to his doctors' advice.
The spokesperson continued: "Any public-facing engagements will be announced nearer the time in the usual way, and will remain subject to doctors’ advice, but it will not be a full summer programme.
King Charles will be returning to duties
PA"His Majesty will of course continue with all official State business and selected audiences, as he has done throughout his period of treatment."
Buckingham Palace will take steps to ensure King Charles does not take on too much amid his upcoming external engagements.
A spokesperson said: "The pacing of The King’s programme will be carefully calibrated as his recovery continues, in close consultation with his medical team."
The Palace has not confirmed whether or not King Charles will attend his Birthday Parade, D-Day Commemorations, Garden Parties, Royal Ascot or an Autumn Tour overseas with Queen Camilla.