Sri Lanka, April 27 -- Donald Trump has said King Charles III will "be very safe" during his state visit to the US, which is due to begin later on Monday.

Further security talks took place between the White House and Buckingham Palace after a gunman gained access to an event attended by Trump in Washington DC on Saturday.

Asked about the security implications for the royal visit, the US president told CBS' 60 Minutes on Sunday that the grounds of the White House, where King Charles will visit, are "really safe".

The King and Queen's programme will go ahead largely as planned, Buckingham Palace said, with the UK government hoping it could ease diplomatic tensions.

The UK's ambassador to the US, Sir Christian Turner, said the visit woul...