King Charles has instructed his aides to ramp up plans for a two-week state visit to Australia after a positive start to his cancer treatment.

The Monarch is planning to head down under for a royal visit with Queen Camilla in October.

A source told the Sun: ‘The King is raring to go and keen to get on with the job.’

Charles is said to be ‘supercharging’ plans for the trip, which will also see him visit New Zealand and Samoa, after reportedly feeling ‘over the moon’ after a successful start to his cancer treatment.

The King and Queen will visit Australia in October (Picture: EPA)

However, it is believed the tour would include ‘significant down-time’ to ensure he has enough energy to perform his royal duties, according to insiders.

Buckingham Palace said ‘nothing is ruled in or out’ after the King was spotted on an Easter walkabout on Sunday.

But despite Charles’ desire to ‘get on with the job,’ they remain ‘cautious’ about his physical health following his diagnosis.

Charles is known to take around six or seven engagements each day on a foreign tour. An insider told the publication: ‘The King is raring to go after a significant amount of time off due to his cancer diagnosis.

Britain’s Prince Charles and Camilla, the Duchess of Cornwall, unveil a stone engraving that commemorates the centenary and mirrors the foundation stone laid by King George V in 1913, as they visit Australia House to celebrate the centenary of its completion in 1918 in London, Thursday, Nov. 22, 2018.(AP Photo/Frank Augstein, pool)

The tour will also include a visit to New Zealand and Samoa (Picture: AP)

‘He knows he can’t hang around and is feeling extremely positive after tests meant he could attend the Easter Sunday service and spend time meeting the public, which he has missed.

‘Although his doctors are keeping an eye on his health, he’s itching to take the reins and get back to his public role as Head of State.

‘He’s over the moon with the way treatment has gone and supercharging plans for Australia, New Zealand and Samoa.

‘He wants to follow his mother Queen Elizabeth II’s mantra, that he needs to be seen to be believed.’

Trips to Australia are considered to be amongst the most prestigious and gruelling engagements on the royal calendar, which involve traversing 20,000 miles over the course of a 21-hour flight.

Queen Elizabeth was the only serving monarch to set foot in the country, having visited 16 times over the course of her reign, the first in 1954 and last in 2011.