The king is then expected to lay a wreath at Arlington National Cemetery, across the Potomac River in Virginia, a sacred site for many Americans where tens of thousands of the country’s war dead are buried, as well as two presidents and some former Supreme Court justices.

The royal visit to the US, officially to commemorate the 250th anniversary of America’s Declaration of Independence from British rule, came at a time of tensions between Britain and the US, with Trump having criticised British Prime Minister Keir Starmer for what he says is his lack of help in the US-Israeli war on Iran.

Charles and Camilla are due to fly to Bermuda this evening, after attending events in Virginia.

The centerpiece of the royal visit came on Tuesday, when Charles addressed a joint meeting of the US Congress followed by a state dinner at the White House hosted by Trump and the first lady.

During the visit, Charles stressed the historical military and cultural ties between Britain and the US, as well as the importance of Nato at a time when Trump has been critical of the Western military alliance’s reluctance to provide military assistance in the Iran war.

Yesterday, the king and queen commemorated victims of the Sept 11, 2001, al Qaeda attack on New York City, laying a floral bouquet at the memorial where the World Trade Center’s twin towers once stood.