Prince Philip is showing signs of improvement more than three weeks after he was admitted to hospital but is in some pain, according to Prince Charles’ wife Camilla.

The 99-year-old husband of the Queen, who has also undergone tests for a pre-existing heart condition, “hurts at moments”, the Duchess of Cornwall said.

Philip, the Duke of Edinburgh, was admitted to hospital on February 16 after he felt unwell to receive treatment for an unspecified but not coronavirus-related infection.

On Monday, he was transferred to another hospital which specialises in cardiac treatment for additional tests and observation relating a pre-existing heart condition, Buckingham Palace said.

On a tour of…