Those hoping to replace Jeremy Corbyn include Rebecca Long-Bailey, Sir Keir Starmer and Lisa Nandy. Candidates need the support of three unions and affiliate groups representing 5 per cent of the membership to progress. Ms Nandy, Sir Keir and Ms Long-Bailey have secured the support of unions and affiliates but Emily Thornberry failed to get over the line. A poll of party members released on January 2 put Sir Keir as the clear frontrunner. According to the poll, he would comfortably defeat Ms Long-Bailey in a final round run-off. But there is a long way to go. Here we list the remaining hopefuls who could find themselves facing Boris Johnson at the despatch box in three months" time. Backers: Ms Long-Bailey is a close ally of shadow chancellor John McDonnell, who is said to have been mentoring her to take over as leader for several months. She declared her candidacy in January but has good odds on being the next leader as the so-called "continuity Corbyn" candidate. The shadow business secretary has also received the backing of frontbench colleague Richard Burgon, who is running to be deputy leader. Ms Long-Bailey is thought to have the support of Len McCluskey, the head of Labour"s biggest trade union backer Unite, and Labour chairman Ian Lavery, who gave up his own leadership campaign to back Ms Long-Bailey. Election verdict: In an article published on December 30, Ms Long-Bailey claimed that Brexit had played a major role in Labour"s election defeat, but later rated Mr Corbyn "ten out of ten". Writing for The Guardian, she argued that Labour"s "compromise solution" on a second referendum had "satisfied too few" but said that media attacks on Mr Corbyn had been unfair and personal. However, in a bid to differentiate herself from Mr Corbyn, who has been accused of driving away traditional Labour voters due to perceptions that he is too London-centric, Ms Long-Bailey has also been keen to emphasise her northern, working-class roots. Continuity Corbyn? The MP for Salford and Eccles has laid out a pitch for “progressive patriotism” and says that a “compromise position” on Brexit involving a new deal and second referendum was partly to blame for Labour’s election defeat. Unlike other candidates who have declared their leadership bids, Ms Long-Bailey has avoided the circuit of politics programmes and shied from explicitly criticising Mr Corbyn. Despite the party"s massive defeat in December"s election, Ms Long-Bailey said Mr Corbyn"s work in reforming the party had been a success. Her embrace of patriotism has been seen as an attempt to patch over one of the major Tory attacks on Mr Corbyn as a stooge of foreign states. Odds: 5/1 (Ladbrokes) Backers: He played a leading role in shaping Labour’s Brexit policy to stage a second referendum and is likely to receive the backing of grandees from the New Labour era, such as Tony Blair and Peter Mandelson. Sir Keir is keen to be seen as a "man of the people" and in recent interviews has highlighted his modest upbringing and background. However, he is already coming under attack from the Corbyn wing of the party, amid claims that a London-based Remainer will not be able to repair the party"s historic links with the Leave-voting working-class communities. Election verdict: Has expressed frustration over the party"s Brexit ambiguity and felt that he should have been given the opportunity to confront Boris Johnson on the main issue of the election. He has said Labour “should have taken a stronger position one way or the other" during the election. Continuity Corbyn? A passionate Remainer, the former Director of Public Prosecutions is seen as a centrist candidate. Mr Starmer distanced himself from Mr Corbyn by questioning his handling of anti-Semitism, which he said came up on the doorstep during the election campaign as “a question of values and competence”. He said he thought private schools should be an “irrelevant” issue in British politics, despite Mr Corbyn leading the education offering of his manifesto with a commitment to abolish their charitable status. Backers: The Wigan MP has impressed a number of backbenchers and party grandees and is seen as someone who could reconnect with the party"s lost heartlands. Election verdict: "Trust was the issue. Not the radicalism, not the deeper fundamental change we were promising, but trust," she told Sky’s Sophy Ridge. Ms Nandy also criticised Labour’s free broadband pledge, telling Pienaar"s Politics on BBC Radio 5 Live that voters cared about the "more pressing issue in their lives" of buses, adding: "It"s not about whether you"re radical or not, it"s about whether you"re relevant." Continuity Corbyn? The 40-year-old is desperate to change Labour"s "metropolitan" image and refocus on winning back the support of "left behind" towns and working-class areas. Backers: A potential wild card in the leadership contest, Mr Lewis is signed up to Mr Corbyn"s domestic agenda but as a Remainer has been highly critical of the party"s Brexit stance. He has already secured a couple of endorsements, but is unlikely to win over Corbynistas from Ms Long-Bailey in the numbers required to be considered a serious prospect. Election verdict: Mr Lewis has accused Mr Corbyn of triangulating on Brexit but has also claimed that Labour has not shifted far away enough from the era of Tony Blair and Gordon Brown. Continuity Corbyn? Firmly on the Left of the party but lacks the experience and name recognition of other Corbynistas that are likely to stand. Backers: With a famously down-to-earth approach, she won the support of many moderate MPs, including Wes Streeting. Despite representing a Leave-voting constituency, Ms Phillips has always supported remaining in the EU and has indicated she could campaign to re-join the bloc after Brexit. She told the BBC’s Andrew Marr: “The reality is if our country is safer, if it is more economically viable to be in the European Union, then I will fight for that, regardless of how difficult that argument is to make." Election verdict: Has blamed Jeremy Corbyn for a failure of leadership and inability to tackle anti-Semitism in the party. Continuity Corbyn? Is a self-declared socialist but is far removed from the politics of Mr Corbyn"s wing of the party. Backers: The first to officially announce she would be running for the top job, Ms Thornberry has been the most candid - and brutal - in her assessment of where Labour went wrong under Mr Corbyn. She has also highlighted her battles with Boris Johnson while he was foreign secretary, during which she claimed to have "pummelled him every week". She received the backing of some influential Labour moderates although the majority backed Sir Keir. Election verdict: The shadow foreign secretary has made clear that she warned against calling an election before Brexit had been resolved, and has laid the blame for the party"s shortcoming at the feet of his closest advisers. Continuity Corbyn? Ms Thornberry, who was sidelined during the election campaign and did not often appear in its broadcasts, said the public were unable to trust Labour and Mr Corbyn to form a credible government. "In the end, we can say until we are blue in the face that there is another way- and there is - but we won"t get the opportunity to serve if people don"t believe us,” she said. Ms Thornberry said Mr Corbyn had “many talents” including “winning the argument on austerity” but said the most important task was “to win elections”.