Boris Johnson has said there is “more that unites than divides” him and Joe Biden as he pledged to work together to defend “common values and interests”.
The UK prime minister told broadcasters he and the US president-elect shared a belief in democracy, human rights, free speech and free trade.
He also welcomed the “real prospect” of the US now showing “global leadership” on climate change.
Mr Biden’s allies have meanwhile sought to smooth over Brexit differences.
Senator Chris Coons, who is tipped to become secretary of state in the Biden administration, said the election was an opportunity “to jump start a new chapter” in transatlantic relations.
Asked about Mr Biden’s opposition to Brexit when he was Barack Obama’s vice-president and his subsequent criticism of Mr Johnson, he said he expected there to be some “reconsideration of whatever comments may have been made about the moment of Brexit” in the coming weeks and months.
Following Mr Biden’s victory, Foreign Secretary Dominic Raab said the UK would “listen carefully” to US concerns about the impact of the UK’s departure from the EU on stability on the island of Ireland and the Good Friday Agreement.
Mr Biden has vowed to unify the US after he was declared the winner of the presidential election on Saturday.
The Republican incumbent, President Donald Trump, who is a strong supporter of Brexit, has yet to concede defeat and is taking legal action in a number of states, alleging voting irregularities.
Mr Raab told the BBC’s Andrew Marr that the UK had always had faith in the integrity of the US electoral system to produce a “clear” outcome, which he said it had now done.
“We want to avoid getting sucked into domestic American politics but it is very clear now, in our view, that there is a definitive result,” he said.
He said the British