The bombshell revelation is all the more startling given that the Labour politician had a majority of over 17,400 at the last general election in 2010.

The latest Survation poll carried out for a Scottish daily newspaper questioned a total of 1,001 participants, of which 45.8 per cent said they would be voting SNP and 23.9 per cent Labour.

However, Ms Doyle said this week she will fight for every vote.

She told the Reporter: “I know that people in West Dunbartonshire want to see the back of David Cameron, and in May we have a clear choice between a Tory or a Labour Government.

“I hope people choose to elect a Labour Government, and I will be working hard to make that happen.

“Every vote will count in deciding whether it is Ed Miliband or David Cameron who is in No 10 on May 8 2015.” With currently leaderless Scottish Labour now seemingly in freefall in the aftermath of the referendum and the resignation of party leader Johann Lamont, the latest voting intentions predictions would leave the party with only a handful of MPs at Westminster.

If the predictions do prove correct then dozens of “safe” Labour seats could be set to fall, including traditional strongholds. The West Dunbartonshire seat — Dumbarton, the Vale of Leven and Clydebank — has been held continuously by Labour since 1950, although boundary changes altered the constituency in 1983 and 2005.

It would take a massive swing for the SNP to take the West Dunbartonshire as at the 2010 general election 25,905 constituents voted Labour with Gemma Doyle winning the seat with a massive 61.3 per cent of the vote.

The SNP’s Graeme McCormick could only muster less than a third of that number with 8,497 votes.

The SNP currently have just six MPs while Scottish Labour MPs fill 40 of the seats in the Westminster chamber.

The predicted outcome would see a huge surge in the number of SNP politicians in London to 52 in total.

The number of those stating they would be voting for the Conservatives remained fairly steady on 16.7 per cent but the Lib Dems vote dropped by more than 12 per cent to 6.1 per cent. Meaning each would only win one seat.

When contacted by the Reporter the SNP wouldn’t comment on predictions on specific seats but the party’s Westminster leader Angus Robertson MP did comment on the Survation poll.

He said: “It reflects all recent surveys in underlining the strength of the SNP vote, and is a further demonstration that Labour and the other Westminster parties are facing a major backlash in Scotland.

“We take absolutely nothing for granted, and know there is a huge amount of hard work to be done in the weeks and months ahead — but there is no doubt that the SNP have momentum going into next year’s Westminster election.”