Support for Sir Keir Starmer’s Labour Party has fallen to just 14 per cent in a damning new opinion poll.

Sir Keir, who won a thumping landslide victory last summer on 34 per cent of the vote, is now in a distant fourth place, according to Find Out Now’s latest survey.

Reform UK remains well out in front, with Nigel Farage hoovering up 31 per cent of the vote.

Kemi Badenoch’s Conservatives trailed in second place on just 20 per cent, leaving Zack Polanski’s Green Party in third on 18 per cent.

Such a scenario would hand Reform UK 400 seats and a majority of 150, polling aggregator Electoral Calculus has revealed.

Despite trailing the Tories, the Greens would become the official opposition on 58 seats.

The Liberal Democrats, who received just 11 per cent of the vote in the poll, would retain their third-party status on 48 seats.

Meanwhile, the Tories would fall behind the SNP on 39 seats and Labour would slump to just 25 seats.

Sir Keir would likely lose his Holborn & St Pancras seat to the Green Party.

Meanwhile, Rachel Reeves, Angela Rayner and Yvette Cooper would be swept up by Reform UK’s surge.

Reform’s rise would also see off a number of Tory bigwigs, including Robert Jenrick and Sir Mel Stride.

Tyron Surman, Find Out Now’s head of research, said it was the “lowest score we have ever had for Labour”.

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He added: “People will point out that we have them lower than other pollsters… but worth remembering that every single pollster – not one exception out of roughly 20 pollsters – overstated Labour at the last election.”

Find Out Now, which tracks Reform UK slightly higher than other pollsters, believes Mr Farage’s support has stabilised at 31 per cent.

Meanwhile, Labour has been tracking down at two different points.

The first came as Mr Farage’s support steadily rose in the opinion polls.

A second dip came for Sir Keir following Mr Polanski’s victory in this year’s Green Party leadership contest.

Meanwhile, Mrs Badenoch’s support took a hit earlier this year, dropping to a record-breaking low of just 15 per cent.

However, the Tories have since been handed a slight boost in the polls, taking them narrowly ahead of the Greens.

Despite support for the Liberal Democrats flatlining, Sir Ed Davey will likely benefit from the first-past-the-post system and retain a vast majority of his MPs.

The dire polling comes after MPs set a date to debate a petition calling for an immediate General Election.

More than one million Britons signed the petition demanding a snap poll.

The Petitions Committee yesterday confirmed the debate will take place on January 12.

Tory MP John Lamont will open the debate, with Sir Keir sending a Minister to respond.