King Charles and Prince William could visit the U.S. next year to mark the 250th anniversary of the Declaration of Independence and boost relations with Donald Trump, who has frequently spoken of his admiration and respect for the British monarchy.

King Charles and King Abdullah II are among the royals who have congratulated President Donald Trump on his inauguration. Find out what the royals said in their messages to the 47th President of the United States.

The King has sent a personal message of congratulations to Donald Trump on his inauguration, reflecting on the enduring special relationship between the UK and US, Buckingham Palace said. Charles’s private written words were delivered to mark Mr Trump being sworn into office as US president for a second time.

King Charles has sent a personal message of congratulations to Donald Trump following his historic second inauguration as US President, Buckingham Palace has revealed. The monarch's private correspondence praised the special relationship between the United Kingdom and the United States.