SCOTTISH Labour is on course to lose all the Westminster seats it won from the SNP last year, a new poll has forecast.

It suggested Jeremy Corbyn’s party would fail to regain six seats north of the border, leaving it once more with a solitary Scots MP, while the Scottish Tories would lose eight to take them to five. All 14 constituencies would return to Nicola Sturgeon’s party.

At Westminster the Survation poll put the SNP on 42%, up five points since last year’s snap election, while Labour and the Tories would see support tumble by 4% to 23%, and by 5% to 24% respectively.

There was better news for Labour in a Holyrood vote with the survey suggesting it would return to second place behind the SNP, while the Tories would be third.

Professor Sir John Curtice, of Strathclyde University, calculated the vote share would leave the SNP with a total to 49 MPs, while the Lib Dems would hold onto its four Scottish seats.

“Labour’s chances of winning the next UK election rest heavily on making a significant advance north of the Border,” said Curtice. “Yet it seems Labour’s support is going backwards, and that they run the risk of losing all the seats they regained from the SNP last year.” He said Labour’s Westminster prospects had been dented by a fall in Corbyn’s popularity with just 28% of Scots saying they feel favourably towards him.

The poll, which was commissioned by the Record, put the SNP at Holyrood down three points to 43% of the constituency vote and down nine points to 33% on the top-up list. However, it forecast a continued pro-independence majority when Greens’ seats are taken into account.

Labour are on course for 21% on both Holyrood votes, the Tories are at 24% for the constituency and 19% for the list, while the Lib Dems are at 9% and 10%. The Greens polled 11% for the regional list giving them 10 seats, and UKIP 5%. Curtice said the results suggested the SNP would have 59 seats at Holyrood (down four), with Labour on 26 (up two) and the Tories on 23 (down eight). The Lib Dems would increase their seats to 11 (from five) .

SNP depute leader Keith Brown said: “What’s clear is fewer and fewer people think Labour are a serious alternative.”

Labour’s Neil Findlay said: “At the 2017 general election, Labour offered a radical vision of change, extending public ownership, ending austerity and redistributing wealth and power. Scottish Labour, with Richard Leonard as leader, are building on that radical approach.”

The online survey of 1002 Scots took place between July 5 and 10.