LABOUR and the Conservatives would be wiped out in Scotland at the next general election if they did not back a public vote on any Brexit deal, says the pro-Remain Best for Britain campaign following new polling analysis.

The snapshot was undertaken by Focaldata, a polling agency said to “specialise in understanding niche audiences,” after collating information from several recent polls of more than 15,000 people undertaken last month.

According to the analysis, if a UKwide poll were held now, the SNP would virtually repeat its landslide victory of 2015 by winning all but four of Scotland’s 59 seats.

These four – Caithness, East Dunbartonshire, Edinburgh West and Orkney and Shetland - would be retained by the Liberal Democrats. Although in the case of Edinburgh West, held by Christine Jardine, the analysis says her party would poll 30.58 per cent and the SNP would poll 30.58 per cent.

Scottish Labour is forecast to haemorrhage 40 per cent of their 2017 votes if an election was held now, meaning it would lose all seven of its current seats.

The analysis shows the SNP would pick up a number of seats thanks to the Brexit Party splitting the Leave vote.

For example, in Banff and Buchan, currently a Conservative seat, Nigel Farage’s party would pick up 26.6 per cent of the vote, pushing the Tories into third place on 20.6 per cent and handing the seat to Nicola Sturgeon’s Nationalists on 34.2 per cent.

David Mundell’s seat of Dumfriesshire, Clydesdale and Tweeddale, which he holds with a 9,441 majority, would also go to the SNP. The analysis says the Scottish Secretary would poll 26.1 per cent behind the SNP on 30.2 per cent. The Brexit Party would poll 17.8 per cent.

In Labour’s safest Scottish seat, Edinburgh South, held by the Remainer Ian Murray, this would go to the SNP on 32.1 per cent ahead of Labour on 27.9 per cent with the Lib Dems on 14 per cent and the Brexit Party on 7.6 per cent.

Across the UK as a whole, the analysis suggests Labour would be the largest party with around 200 seats, Brexit would be second with 135 seats, the Tories after losing 180 seats would be in third on 133, the Lib Dems would pick up 53 to 64 and the SNP would increase its seat tally by 20 to 55. The suggestion is that if Jeremy Corbyn wanted to govern, he would have to form an alliance with either the Lib Dems or the SNP.

Leading Tories such as Penny Mordaunt, Amber Rudd, James Brokenshire and Gavin Williamson, would all lose their seats while those of Boris Johnson and Iain Duncan Smith would become very marginal.

The polling analysis has been released on the eve of a meeting of Scottish Labour’s Executive Committee in Glasgow tomorrow, which is due to decide whether to commit to backing a second referendum in all circumstances, as supported by leader Richard Leonard.

Sources close to the party leader suggest he is confident members will back a confirmatory vote with an option to remain.

The current Labour policy is to firstly seek a general election and if that fails have the option of backing a second EU poll.

Pressure mounted on Scottish Labour to clarify its position on Brexit following a poor showing at the European elections which saw the party slump to fifth place with just 9.3 per cent of the vote, lose both its MEPs and caused two frontbenchers to resign.

With the polling pointing towards Labour being without any Scottish MPs for the first time in almost 100 years, campaigners have used the new polling to renew calls for Scottish Labour to unequivocally push for a second EU referendum while supporting remain.

Naomi Smith, Best for Britain’s Chief Operating Officer, said: "The consequences of Labour's ambivalent policy towards a final say on Brexit looks set to hurt them further. They're expected to lose almost half of their 2017 vote share, according to our analysis.

"The Labour leadership now needs to pick a side and that can start with the Scottish Labour executive committee voting to become a party of Remain.

"It's obvious which position Labour should take if it wants to be in government and Scottish Labour leader Richard Leonard can demonstrate leadership on this for the entire UK party," she added.

According to analysis of the voting intentions of 15,231 survey respondents across Britain, only 57 per cent of people who voted Labour in 2017 said they would do so again in a new election.

Some 30 per cent would vote for Remain-supporting parties, with 19 per cent going to the Lib Dems, nine per cent for the Greens and two per cent to Change UK. A further two per cent would support the SNP - or Plaid Cymru in Wales - while 10 per cnet would go to the Brexit Party.

Nick Lowles, Hope Not Hate CEO, said there was a majority for parties against a no-deal Brexit but warned that Labour "is bleeding votes to parties that have taken a clear anti-Brexit stance".

"This poll reveals a quite shocking surge in a hardline right-wing Brexit Party, led by a divisive and dangerous politician in Nigel Farage,” declared Mr Lowles.

"A hard Brexit, or a no-deal Brexit, would cause untold damage to those communities where the far right wants to stir up division.

"Labour will lose seats in areas that voted Leave if they continue to lose the support of Labour remain voters. It's counter-intuitive but it's the reality.

"The evidence is clear - from this poll, and the recent election results - if Labour wants to win a majority at the next election, it needs to move to keep its Remain voters on board," he added.