The King and Queen's state visit to the United States will be about "renewing and revitalising a unique friendship", says the UK's ambassador, Sir Christian Turner.
The royal visitors, arriving on Monday, were already facing a diplomatic challenge with political tensions between the US and the UK.
But the shooting incident in Washington DC at the weekend, at an event attended by President Trump, added another layer of security concerns.
The UK ambassador said the Prime Minister Sir Keir Starmer had spoken to President Trump on Sunday, and the trip would be going ahead largely as planned.
King Charles and Queen Camilla had privately reached out to the Trumps to give their sympathies after the attack.
