Jeremy Corbyn will today claim there has already been an economic "benefit" of Brexit, as he launches a campaign to boost British manufacturing.

The Labour leader will suggest the crash in the pound that followed the 2016 referendum made sterling more competitive and should have helped UK exporters, had the government had a plan to let them capitalise on it.

It will come in a "build it in Britain" speech, in which Mr Corbyn will also attack a reliance on imports made by "cheap labour from abroad" and demand government contracts are kept in Britain instead of being given to "companies outside the UK".

The nod to potential economic benefits of leaving the EU will anger those in his party who want the Labour leader to soften his stance on Brexit, while his rhetoric on industry is likely to be compared to Donald Trump's "America first" approach to manufacturing.

Mr Corbyn will use a speech in Birmingham to claim the government has prevented UK businesses from exploiting the "one benefit" Brexit has already delivered.

He is expected to say: “Our exporters should be able to take proper advantage of the one benefit to them that Brexit has already brought - a more competitive pound.

"After the EU referendum result, the pound became more competitive and that should have helped our exporters. But they are being sold out by a lack of a Conservative government industrial plan, which has left our economy far too reliant on imports.”

The pound plummeted in the wake of the vote to leave the EU, wiping billions off the economy and leaving many businesses and consumers worse off. Sterling is currently worth around 14 per cent less against the Euro than it was before the Brexit vote.

Launching Labour's "Build it in Britain" campaign, Mr Corbyn is expected to condemn what he will call a reliance on overseas workers, and criticise the government for awarding contracts to foreign companies.

Speaking to the EEF manufacturers union, he will say: “For the last 40 years, a magical kind of thinking has dominated the way Britain is run. We’ve been told that it’s good - advanced even - for our country to manufacture less and less and instead rely on cheap labour from abroad to produce imports, while we focus on the City of London and the finance sector."

He will add: “A lack of support for manufacturing is sucking the dynamism out of our economy, pay from the pockets of our workers and any hope of secure well-paid jobs from a generation of our young people. It must be our job in government to reprogramme our economy so that it stops working for the few and begins working for the many. That is why we will build things here again that for too long have been built abroad because we have failed to invest.”

No-deal Brexit could happen 'by accident', Jeremy Hunt says

Mr Corbyn's team will hope the message will go down well in Labour's northern heartlands, where many areas voted Leave amid concerns over immigration.

However, it is likely to be criticised by some of the party's own MPs, who are pushing for their party leader to adopt a more anti-Brexit stance and commit to keeping the UK in the EU single market.

Comparisons are also likely to be drawn between Mr Corbyn and the language used by Mr Trump as he set out his "America first" approach during the White House's "Made in America Week" last week.

The US president said: "We want to build, create and grow more products in our country using American labour, American goods and American grit.

"American workers, farmers and innovators are really the best in the world. You construct and harvest products that fill our homes, feed our nation and enrich our lives."

He added: "Restoring American manufacturing will not only restore our wealth, it will restore our pride in ourselves, it will revitalize our independence."

People's Vote march – demanding vote on final Brexit deal Show all 30 1 / 30 People's Vote march – demanding vote on final Brexit deal People's Vote march – demanding vote on final Brexit deal Mandatory Credit: Photo by Guy Bell/REX (9725259aq) Marching down Whitehall - People's March for a People's Vote on the final Brexit deal. Timed to coincide with the second anniversary of the 2016 referendum it is organised by anti Brexit, pro EU campaigners. People's March for a People's Vote, London, UK - 23 Jun 2018 Guy Bell/REX Rex People's Vote march – demanding vote on final Brexit deal Demonstrators carry banners and flags as they participate in the People's March demanding a People's Vote on the final Brexit deal, in central London on June 23, 2018, the second anniversary of the 2016 referendum. Tens of thousands of people demonstrated in London on Saturday calling for a second vote on Britain's departure from the European Union. / AFP PHOTO / Niklas HALLE'NNIKLAS HALLE'N/AFP/Getty Images NIKLAS HALLE'N AFP/Getty Images People's Vote march – demanding vote on final Brexit deal A young protestor shouts as she takes part in the People's Vote demonstration against Brexit Getty Images People's Vote march – demanding vote on final Brexit deal A woman holds a placard as she joins EU supporters, calling on the government to give Britons a vote on the final Brexit deal, participating in the 'People's Vote' march in central London, Britain June 23, 2018. REUTERS/Henry Nicholls HENRY NICHOLLS Reuters People's Vote march – demanding vote on final Brexit deal epa06833888 Pro-EU demonstrators take part in a People's March anti-Brexit rally in Parliament Square in London, Britain, 23 June 2018. Protesters are calling for a referendum on the final deal. 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The protest is taking place on the second anniversary of the Brexit referendum. EPA/ANDY RAIN ANDY RAIN EPA People's Vote march – demanding vote on final Brexit deal epa06833264 Thousands of people march through London during a People's March anti Brexit demonstration in London, Britain, 23 June 2018. Protesters are calling for a referendum on the final deal. The protest is taking place on the second anniversary of the Brexit referendum. EPA/ANDY RAIN ANDY RAIN EPA People's Vote march – demanding vote on final Brexit deal Tens of thousands of people march through London EPA People's Vote march – demanding vote on final Brexit deal epa06833265 Thousands of people march through London during a People's March anti Brexit demonstration in London, Britain, 23 June 2018. Protesters are calling for a referendum on the final deal. The protest is taking place on the second anniversary of the Brexit referendum. EPA/ANDY RAIN ANDY RAIN EPA People's Vote march – demanding vote on final Brexit deal Demonstrators at the People's Vote March Getty People's Vote march – demanding vote on final Brexit deal 'Two months too young to decide on my future' REUTERS People's Vote march – demanding vote on final Brexit deal Crowds taking part in the People's Vote march for a second EU referendum at Trafalgar Square in central London. PRESS ASSOCIATION Photo. Picture date: Saturday June 23, 2018. See PA story POLITICS Brexit. 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Mr Corbyn will also promise that a Labour government would hand national contracts to UK companies.

He will say: “We have plenty of capacity to build train carriages in the UK and yet repeatedly over recent years these contracts have been farmed out abroad, costing our economy crucial investment, jobs for workers and tax revenues. If we want to reprogramme our economy so that it works for everybody, we must use powers we have to back good jobs and industry here.

“Labour is determined to see public contracts provide public benefit, using our money to nurture and grow our industries, our people and to expand our tax base.