Almost half of Scottish voters will support the SNP in next month’s General Election as Labour’s share collapses, according to a new poll.

It is the largest lead given to the SNP in any Scottish survey since the campaign proper began.

The SNP’s share of the vote would increase from the 36.9 per cent it secured in 2017, when it won 35 of the 59 Scottish seats up for grabs, to 44 per cent.

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Support for Labour has slumped in Scotland to just 16 per cent of the vote.

While the party secured 27.1 per cent of the ballots cast in the 2017 election, when it won seven Scottish constituencies, research by Ipsos MORI for STV will raise fears the party will suffer losses in two weeks’ time.

Just over a quarter of Scots are backing Boris Johnson’s Conservative Party next month, according to the poll, with this down slightly from the 28.6 per cent support his predecessor Theresa May won in 2017.

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The 13 Tories MPs that were returned then were crucial to keeping her in Downing Street.

Meanwhile, support for the Liberal Democrats, led by Jo Swinson, has increased from 6.8 per cent in 2017 to 11 per cent in the poll – which also put support for the Greens at two per cent, while the Brexit Party polled less than one per cent.

– Ipsos MORI questioned a total of 1,046 Scots between November 19 and November 25 for the poll.