Cancer-stricken King Charles is seen smiling as he attends church at Sandringham - a week after surprise Easter Sunday walkabout that delighted well-wishers

King Charles has been pictured making his way to a Sunday morning church service in Sandringham as he continues his cancer recovery.

The 75-year-old monarch appeared to be in good spirits as he smiled in the backseat of a car as he was driven to St Mary Magdalene Church.

The King has been balancing his time between his Sandringham estate in Norfolk and London, where is receiving his treatment for cancer.

It comes a week after he greeted well-wishers at an Easter Sunday service in Windsor in what was his first major public appearance since his cancer diagnosis.

The King's recent cheery appearances will provide great reassurance to the public after the monarch took a step back from his official duties following the announcement of diagnosis on February 6.

King Charles and Queen Camilla shook hands with dozens of people who lined up outside St George's Chapel in Windsor last weekend. 

The King was applauded by members of the public as he left St George's Chapel to cries of 'Happy Easter' last Sunday.

One man told him to 'keep going strong' while others said he 'looked well' and seemed in 'good spirits'. 

'We're all rooting for you, we've all got your back,' a member of the public said.

Another man said: 'Keep going strong, Your Majesty. Keep going strong, never give in.'

The King jokingly replied: 'I have to obey my instructions.'

The King has continued some work since his diagnosis, but all engagements have taken place privately.

Earlier this week, it was reported that Charles is 'raring to go' for a two-week state visit to Australia.

The monarch could return Down Under in just months with Queen Camilla at his side as he prepares for a trip in October.

The monarch is said to be feeling 'optimistic' after his Easter meet with the public - and has reportedly told aides he is 'supercharging' plans for a two-week trip in which he would also visit New Zealand and Samoa.

'The King is raring to go after a significant amount of time off due to his cancer diagnosis,' a source told The Sun.

'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.

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

Charles is reported to be feeling 'over the moon' after his cancer treatment has started well.

A source told the paper that he had responded 'very encouragingly' and doctors have since been able to adjust their guidance on what he can and can't do.

They added that 'the road ahead is looking positive' - although they maintained 'caution is the watchword'.

But the upcoming tour would have significant differences to the Royals' usual trips - and would include 'significant down-time', insiders say.

The Australian tour is seen as one of the most important for the King, with the late Queen visiting the country 16 times in her reign.

And more than a year since her death, she remains the only reigning monarch to have visited.

On Tuesday, the King announced the appointment of Sam Mostyn as the next Governor-General of Australia. She will officially take her place in July as the British monarch's representative. 

No upcoming trips have been confirmed, Buckingham Palace has told MailOnline.