Remarks by US president likely to cause embarrassment for aides of UK monarch, who usually remains neutral

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Donald Trump has claimed King Charles agrees with him that Iran should never be allowed nuclear weapons.

Trump made the remarks at a White House state dinner on Tuesday in honour of the visiting Charles and Camilla, after the two men sat down to bilateral talks earlier that day.

Remarks marking 250th anniversary of American independence tell US lawmakers: ‘The actions of this great nation matter’

King Charles has extolled the importance of Britain’s “special relationship” with the US in a speech to Congress that made pointed reference to the importance of Nato, the defence of Ukraine and the climate crisis.

In a speech that will be read as a veiled plea to Donald Trump to return to the US’s traditional European alliances and restore his country’s role as a defender of liberal values, Charles said: “America’s words carry weight and meaning, as they have since independence. The actions of this great nation matter even more.”