King Charles reportedly feels like he is "back in business" and is looking forward to the "second chapter of his reign"

A source told The Mirror newspaper: "There has been a lot going on, but the King has always been upbeat. Not once has he allowed himself to question the future - he's dealt with everything head on.

"Now he is back in business. There is a spring in his step and a renewed vigour with it too. Everything is looking positive, which is welcome.'

"The King very much feels this is the second chapter of his reign and he is very positive about the future."

As well as facing his own health struggle over the last year, Charles was dealt a further blow when his daughter-in-law Catherine, Princess of Wales was also diagnosed with cancer shortly after his own came to light. She also stepped away from public duties while undergoing chemotherapy treatment.

Charles has been getting back to work recently and undertaking more public engagements while he's also due to head Down Under for a tour of Australia and Samoa alongside Queen Camilla in the autumn.

The visit will mark their first major overseas trip since news of Charles' cancer was broken.

Charles stayed away from public duties for around three months after he was diagnosed with cancer in January with Camilla taking on much of his workload.

He returned to work in April with a visit to a cancer centre in London where he met with fellow patients, and insiders had said "down time" will be incorporated into the Down Under trip to make sure Charles does not work too hard.