British Prime Minister Boris Johnson has called for "closure" on Brexit, saying his election victory provides an overwhelming mandate to take Britain out of the EU on January 31.
Johnson, the face of the victorious Leave campaign in the 2016 referendum, fought the election under the slogan of "Get Brexit Done", promising to end the deadlock and spend more on health, education and the police.
He was vindicated with the biggest Conservative win since Margaret Thatcher's landslide victory of 1987.
Johnson trounced his socialist Labour Party opponent Jeremy Corbyn by winning 365 seats with a majority of 80. Labour won just 203 seats in Wednesday's general election.
"I frankly urge everyone on either side of what are, after 3.5 years, an increasingly arid argument, I urge everyone to find closure and to let the healing begin," Johnson said outside his residence at 10 Downing Street on Thursday.
"I know that after five weeks, frankly, of electioneering, this country deserves a break from wrangling, a break from politics and a permanent break from talking about Brexit."
With such a commanding majority, Johnson will now swiftly ratify the Brexit deal he struck with the EU so that the UK can leave on January 31 - 10 months later than initially planned.
Johnson's Conservatives increased their share of the vote to 43.6 per cent - their highest since Thatcher's first election victory in 1979, and higher than Tony Blair's in any of his three election wins.
Though now free to realise his Brexit dream, Johnson faces the daunting task of negotiating a trade agreement with the EU, possibly in just 11 months, while also negotiating another trade deal with US President Donald Trump.
The outcome of the trade negotiations will shape the future of Britain's $US2.7 ($A3.9) trillion economy.
After January 31, Britain will enter a transition period during which it will negotiate a new relationship with the remaining 27 EU states.
This transition period can run until the end of December 2022 under the current rules, but the Conservatives made an election promise not to extend it beyond the end of 2020.
German Chancellor Angela Merkel said many within the EU were relieved that Britain would now have a parliament with a clear majority, highlighting the frustration that European leaders have felt during three years of political logjam in London.
But Merkel said it would be "very complicated" to complete the talks on a new relationship by December 2020.
French President Emmanuel Macron warned Britain that the more it chose to deregulate its economy after Brexit, the more it would lose access to the EU's single market.
Trump congratulated Johnson and said a US trade deal could be more lucrative than any with the EU, the world's biggest trading bloc.
"Celebrate Boris!" Trump said on Twitter.
Voters unambiguously rejected Corbyn's socialist program of nationalisations and colossal state spending, delivering Labour's worst result since 1935.
Corbyn announced he would step down after a "process of reflection".
Australian Associated Press