King Charles is "on the better side" of his cancer journey

Khan told MailOnline: "He asked me how I was, and I asked him how he was. There was some pleasantries towards the end, but it was a lovely conversation."

The florist added that Charles gave her a "thumbs up" when she asked about his health and told her: "I'd like to think I'm on the better side (of my cancer journey)".

During a recent Buckingham Palace garden party, Charles advocated for the benefits of eating well amid cancer treatment.

The monarch spoke with Stamford Collis, 22, about the student's own experiences of battling cancer at the recent event and Stamford told the Daily Telegraph newspaper: "He was asking me about the treatment I have starting in June and spoke to me about food and diet. He also asked me if I had undergone radiation treatment, which I had earlier this year."

The publication reports the king was heard to say: "It's sometimes about the diet and what you eat. It can help."

This comes after Charles son, Prince Harry, the Duke of Sussex, recently claimed he doesn't "know how much longer my father has".

Speaking about their strained relationship, amid his decision to quit as a senior royal and move to California with his wife Meghan, Duchess of Sussex, and their family, Harry told the BBC: "There have been so many disagreements, differences between me and some of my family this current situation that has been now ongoing for five years with regards to human life and safety is the sticking point it is the only thing that's left.

"Of course, some members of my family will never forgive me for writing a book, of course they will never forgive me for lots of things.

"But you know there is, I would love reconciliation with my family there's no point in continuing to fight anymore, as I said life is precious. I don't know how much longer my father has, he won't speak to me because of this security stuff but it would be nice to reconcile."