Only 30 percent of Britons still believe the UK made the right decision to leave the European Union, the lowest figure recorded by pollsters since shortly after the 2016 Brexit referendum, a YouGov poll showed on Wednesday.
Five years after Britain formally left the bloc on January 31, 2020, the number backing UK withdrawal compares to 46 percent in August 2016, five weeks after the vote.
Fifty-two percent of Britons voted to leave the EU in the referendum in June 2016.
Among those who supported Brexit in the vote, one in six (18 percent) now believes it was an error.
Overall, 55 percent of those questioned were in favour of rejoining, according to the poll of 2,225 people conducted this month.
A large majority (75 percent) of younger adults, who were unable to vote in the referendum, meanwhile disapproved of the leave vote compared to 10 percent who see it as the right choice.
Prime Minister Keir Starmer voted to remain in the EU when he was leader of the opposition Labour Party.
The party, elected to the government last July, is seeking closer relations with the bloc but has ruled out returning to the European single market, customs union, or free movement.