Published: 10:03 AM June 5, 2018 Updated: 6:04 PM September 17, 2020

Disagreement with Britain's decision to quit the European Union has reached its highest point since the 2016 Brexit referendum, according to a new poll.

The YouGov survey found 47% of voters thought the decision to leave was wrong, against just 40% who said it was the right thing to do - the widest margin since the weekly survey began two years ago.

The findings come a week ahead of a series of crunch votes in the House of Commons, as prime minister Theresa May seeks to overturn changes to her flagship Brexit legislation introduced in the Lords.

Without an overall majority in the Commons, the PM is expected to spend the coming days trying to sweet-talk and strong-arm potential rebels who could inflict defeat on some of the government's key Brexit positions.

Mrs May's decision to squeeze Commons consideration of the 15 Lords amendments to the EU (Withdrawal) Bill into a single 12-hour day on June 12 provoked an angry reaction on the opposition benches.

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Labour industry spokeswoman Chi Onwurah branded it "astounding", accusing the government of "showing its contempt for democracy, our future economy and parliamentary sovereignty", while the Scottish National Party's Drew Hendry said the timetable was driven by "Tory self-interest".

Among the changes backed by peers are a requirement to negotiate a future customs union arrangement and a "meaningful role" for Parliament after the exit talks are complete.

Brexit negotiations were resuming in Brussels, with officials discussing remaining issues in the UK's withdrawal agreement, including the status of the border between Northern Ireland and the Republic.

But with the Cabinet seemingly deadlocked on the Irish issue, there was speculation that a White Paper spelling out the Government's Brexit plans in detail may not appear before the upcoming EU leaders' summit on June 28-29.

Downing Street declined to put a timeframe on the publication of the document, and said it was working towards agreement in negotiations by October.

Brussels and Dublin have made clear they want to see progress this month on proposed "backstop" arrangements to keep the Irish border open in the absence of any better solution from the UK.

The 47% who told YouGov the Brexit decision was wrong was up three points on last week and equalled the highest figure since the tracker poll began in August 2016. The 40% saying the decision was right was down three points since last week and the lowest yet recorded.

Some 73% of Labour voters and 83% of Lib Dems said the Brexit decision was wrong, while 69% of Conservative voters said it was right. Some 81% of those who backed Leave in 2016 said they still believed it was the right decision, with 9% now saying it was wrong.

A majority (62%) said the government was handling Brexit negotiations badly, against 23% who thought it was doing well.

Those backing the Brexit decision have outnumbered those who think it was wrong in the regular survey on only one occasion since July 2017.

YouGov interviewed 1,670 voters for The Times weekly tracker poll on May 28 and 29.

Labour MP Gareth Thomas - a supporter of the People's Vote campaign for a second referendum - said: "The government is making a shambolic mess of Brexit and the British people know it.

"They're fast losing confidence that the prime minister is going to come back from the negotiations with anything other than a bad deal.

"The government knows they're making a hash of Brexit, that's why they're trying to ram their Brexit bill through Parliament without proper scrutiny, and why they've again delayed the publication of a white paper setting out their negotiating position.

"It's becoming increasingly clear that Brexit is too big a deal for the politicians to be left to sort out on their own. The 65m people of this country must have their voices heard as well."