Peter Phillips opened up about King Charles cancer diagnosis and revealed whats causing the monarch the most frustration.

Phillips, who is the son of Princess Anne and her first husband, Mark Phillips, is the kings nephew.

The royal family member told Sky News Australia in an interview over the weekend that while the king is in good spirits, hes also hugely frustrated.

Hes frustrated that he cant get on and do everything that he wants to be able to do, Phillips said. But he is very pragmatic. He understands that theres a period of time that he really needs to focus on himself.

But at the same time, he is always pushing his staff and everybody and his doctors and nurses to be able to say, Actually, can I do this? Can I do that? Phillips continued. So the overriding message would be that hes obviously very keen to get back to a form of normality. And hes probably frustrated that recovery is taking a little longer than he would want it to.