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A significant shift in opinion against Brexit is revealed in an exclusive poll for the Mirror tonight.

The ComRes survey shows that if there were a second referendum, 55% would vote to remain in the EU and 45% to leave.

With Don't Knows included the full result was 51% for Remain, 43% for Leave and 6% for Don't Know.

This would overturn the June 2016 referendum result which saw the country vote by 52% to 48% in favour of Brexit .

The poll of 1,049 people was conducted today in the wake of Nigel Farage’s suggestion that there could be a second referendum.

It directly contradicts Mr Farage's claim that the Leave vote would be "very much higher" the second time round.

In a second EU referendum, how would you vote? ComRes for the Mirror, Jan 11 Should there be a second referendum on Britain's EU membership? ComRes for the Mirror, Jan 11

The poll also found there was lukewarm support for the former UKIP leader’s stance, with 43% in favour of a re-run and 51% opposed.

But the survey is likely to be seized on by remain supporters as evidence of a growing sense of buyers’ remorse over the decision to leave the EU.

Among those who backed Brexit in today's poll, 95% are opposed to a second referendum, while 77% of remain voters are in favour of one.

It also reveals that Theresa May faces an uphill battle convincing voters she can negotiate a good deal for the UK.

Two thirds of people (65%) are not confident the Prime Minister can secure a good Brexit deal, with only 30% very or fairly confident.

(Image: Getty) (Image: AFP)

The survey also reveals how Brexit has divided the country by age and political party.

Among Labour voters 64% are in favour of a second referendum with 31% against. By contrast only 18% of Tory voters want a second poll with 79% against.

And if the contest was re-run, 75% of Labour voters would back remain with only 25% for leave. Among Conservative voters 30% would vote remain and 70% leave.

Young voters aged 18-24 are not only in favour of second poll (54% to 37% ) but would vote overwhelmingly to remain by 77% to 23%.

By contrast, among those aged 65 plus 67% would vote to leave and only 33% remain.

(Image: AFP) (Image: Getty)

Older voters are most opposed to a second referendum by 68% to 28%.

Ex-UKIP leader Nigel Farage made the shock call for a second vote this morning, announcing: "My mind is actually changing on this.

"Just maybe I’m reaching the point of thinking that we should have a second referendum on EU membership."

He said a second vote would "kill it off for a generation", claiming: "The percentage that would vote to leave next time would be very much bigger than it was last time round."

He was hailed by Remain-backers, with Labour MP Chuka Umunna declaring: "For perhaps the first time in his life, Nigel Farage is making a valid point."

How confident are you that May can get a good deal? ComRes, Jan 11

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But the announcement sparked a UKIP civil war, with current leader Henry Bolton declaring a second referendum would be "damaging to the nation". And former aide Raheem Kassam said: "We had a referendum."

After a row Mr Farage backtracked tonight, saying: "To be clear, I do not want a second referendum, but I fear one may be forced upon the country by parliament. That is how deep my distrust is for career politicians."

By the time of his U-turn he had already been backed by millionaire donor ally Arron Banks - despite Mr Banks declaring a second referendum "nuts" and "a stunt by people who don't think we can win" in January 2016.

Prime Minister Theresa May's spokesman said: "We will not be having a second referendum."