Rebecca Long Bailey has announced her candidacy for the Labour leadership pledging to continue the work started by Jeremy Corbyn and “go to war with the political establishment”.

Seen as a continuity candidate, the shadow business secretary must overcome scepticism inside the party rooted in its crushing defeat by the Tories in the recent general election, which many blamed on Mr Corbyn.

Launching her campaign in the democratic socialist magazine Tribune, Ms Long Bailey said that “with the climate crisis spiralling and the far right on the march, we must regroup for the struggles ahead”.

She added: “Many candidates in the leadership election say they will not return to the triangulation and Tory-lite policies that held our party back before Jeremy.

“But we need a leader that can be trusted with our socialist agenda. A leader who is totally committed to the policies and has the political backbone to defend them.

General election 2019: How the night unfolded Show all 27 1 /27 General election 2019: How the night unfolded General election 2019: How the night unfolded Boris Johnson wins biggest Tory landslide since Thatcher ...while Labour records worst result since Clement Attlee PA General election 2019: How the night unfolded 11.28pm - First result to be announced Labour holds Newcastle Central, albeit with a reduced majority, in the first result to be announced in the 2019 General Election PA General election 2019: How the night unfolded 11.33pm - Conservatives gain Blyth Valley The Conservatives gain Blyth Valley, in the North East, from Labour in the first big upset of the night. The seat had been held by Labour since 1950 BBC General election 2019: How the night unfolded 1.23am - Conservatives succeed in appealing to "Workington Man" The Tories won the North West constituency from Labour - the first time the seat has changed hands since 1979 Telegraph General election 2019: How the night unfolded 1.27am - The SNP gains Rutherglen & Hamilton West from Labour, the first of six seats they take from Jeremy Corbyn's party First Minister Nicola Sturgeon, takes a selfie with some her newly elected MP's at the Glasgow count Getty General election 2019: How the night unfolded 1.50am - The Tories gain Wrexham from Labour The first time the party have ever held the seat ITV General election 2019: How the night unfolded 1.52am - Labour wins Putney from the Conservatives The party's first gain of the night from the Tories BBC General election 2019: How the night unfolded 1.55am - The SNP gains its first seat from the Tories Winning Angus Press Association Images General election 2019: How the night unfolded 2.33am - Iain Duncan Smith holds on to seat The former Tory leader Iain Duncan Smith held on to his Chingford & Woodford Green seat, but saw his majority cut almost in half to just 1,262 Reuters General election 2019: How the night unfolded 2.46am - Conservatives gain Tom Watson's old seat The Tories gained West Bromwich West from Labour in an 11.69% swing Getty General election 2019: How the night unfolded 2.50am - Bishop Auckland, a Labour seat since 1935, becomes a Tory gain Dehenna Davison won with a majority of 7,962 CharlElmore/Twitter General election 2019: How the night unfolded 2.54am - Chuka Umunna loses out to Tories The former Streatham MP who defected from Labour to the Independent Group before switching to the Liberal Democrats, lost out to the Conservative party in Cities of London & Westminster James Moreland/Twitter General election 2019: How the night unfolded 2.58am - DUP's Westminster leader beaten Nigel Dodds was beaten by Sinn Fein's John Finucane in Belfast North Getty General election 2019: How the night unfolded 3.15am - Tories lose seat to the Lib Dems Zac Goldsmith lost his Richmond Park seat to the Liberal Democrats, the party's first gain of the night PA General election 2019: How the night unfolded 3.24am - Jeremy Corbyn announces he will not lead party in future elections The Labour leader was voted back in to the Islington North seat but described the results as "very disappointing" and said he would not lead the party in any future election campaign Reuters General election 2019: How the night unfolded 3.32am - Labour's Caroline Flint loses her seat to the Tories The first time her party has not held the seat since 1922 Sky News General election 2019: How the night unfolded 3.38am - The Tories beat Labour in Wakefield Mary Creagh lost out to Imran Ahmad-Khan in a Labour seat since 1932 Reuters General election 2019: How the night unfolded 3.42am - Boris extends his majority in Uxbridge & Ruislip South The Prime Minister said: "It does look as though this One Nation Conservative Government has been given a powerful new mandate to get Brexit done." Reuters General election 2019: How the night unfolded 3.44am - The Tories gain Rother Valley and Sedgefield 3.44am - The Conservatives gained Rother Valley, a Labour seat since 1918, and Sedgefield, which was once held by former prime minister Tony Blair AFP via Getty General election 2019: How the night unfolded 3.45am - Jo Swinson loses seat The Liberal Democrat leader lost her Dunbartonshire East seat to the SNP PA General election 2019: How the night unfolded 4.25am - Conservatives retake Kensington from Labour The Tories took back the seat with a margin of 150 votes PA General election 2019: How the night unfolded 5.15am - Major scalp for the Tories 5.15am - Dennis Skinner, Labour's Beast Of Bolsover loses his seat that had been red since 1950 AFP General election 2019: How the night unfolded 6.08am - US President Donald Trump congratulates Boris Johnson on his victory US President Donald Trump congratulates Boris Johnson on his victory https://twitter.com/realDonaldTrump/status/1205368801438707713 General election 2019: How the night unfolded How the UK voted after 649 0f 650 seats General Election 2019 how the UK voted after 649 0f 650 seats. See story POLITICS Election. Infographic PA Graphics PA Graphics Press Association Images General election 2019: How the night unfolded 6.23am - Acting Lib Dem leaders announced 6.23am - Sir Ed Davey and Baroness Sal Brinton were announced as the joint acting leaders of the Liberal Democrats following Jo Swinson's defeat PA General election 2019: How the night unfolded Prime Minister Boris Johnson and Carrie Symonds arrive back at Downing Street AP General election 2019: How the night unfolded State of the parties General Election 2019 state of the parties. See story POLITICS Election. Infographic PA Graphics PA Graphics Press Association Images

“We need a proud socialist to lead the Labour Party, driven by their principles and an unwavering determination to see democratic socialism in our lifetime.

“For all of these reasons and more, I have decided to stand for election to become the next leader of our party. I don’t just agree with the policies, I’ve spent the last four years writing them.”

Ms Long Bailey joins five others – shadow Brexit secretary Sir Keir Starmer, shadow foreign secretary Emily Thornberry, Clive Lewis, Lisa Nandy and Jess Phillips – in the race to become leader of the opposition.

Ian Lavery, another Corbynite leftist, said after Ms Long Bailey’s announcement that he would not stand, choosing to support her instead.

The party’s ruling National Executive Committee announced on Monday that the new leader would be named on 4 April, with Mr Corbyn remaining in post for almost four months after taking the party to its worst general election defeat since 1935.