The King, 76, has been receiving cancer treatment since his diagnosis more than a year ago, but he has been well enough to keep up his public visits and official engagements. While the King has made his treatment public, the Palace has not disclosed further details about his diagnosis.

Britain's King Charles is returning to public duties this week after he was briefly taken to hospital last Thursday when he experienced side effects from his cancer treatment, a royal source said on Monday.

The King is preparing for his usual working week just days after having to cancel engagements following a short stay in hospital due to side effects from his cancer treatment, it is understood