UK Prime Minister Boris Johnson has congratulated Joe Biden on his US election win.
He said he looked forward to “working closely” with the new president-elect.
Labour leader Sir Keir Starmer praised Biden’s campaign of “decency, integrity, compassion and strength”.
Johnson also congratulated the president-elect’s running mate, Kamala Harris, on “her historic achievement”. She will be the country’s first female vice-president.
Vote counting continues after Tuesday’s election, Biden has surpassed 270 electoral college votes – the threshold required to win.
Donald Trump’s campaign has indicated the incumbent president does not plan to concede.
Joe Biden has secured enough electoral votes to become the 46th president of the United States, defeating President Trump and capturing the White House after a bitter campaign that exposed deep divides in the country.
“I am honored and humbled by the trust the American people have placed in me and in Vice President-elect Harris,” Biden said in a statement. “In the face of unprecedented obstacles, a record number of Americans voted. Proving once again, that democracy beats deep in the heart of America.”