Jeremy Corbyn has said the Prime Minister must stand up to Donald Trump over the US's decision to impose a 220 per cent tariff on new passenger jets built by one of Northern Ireland's biggest employers.

Theresa May cannot "bet our economic future on a deregulated trade deal with the US", Mr Corbyn said in his keynote address to the Labour conference in Brighton.

It comes after the US Department of Commerce opted to effectively triple the price of new planes made by Bombardier, a Canadian multinational with a major manufacturing base in Belfast, under pressure from the American aviation giant Boeing.

Unions also accused Ms May of being "asleep at the wheel" and said the US Department of Commerce's decision risked thousands of jobs at Bombardier.

Michael Fallon, the UK Defence Secretary, suggested the Bombardier decision could initiate a trade war with the Trump administration over military contracts.

On Mr Trump, the Labour leader said the US President had given a "deeply disturbing" speech to the UN.

"Devoid of concern for human rights or universal values, it was not the speech of a world leader," he said.

Labour Conference 2017 – in pictures Show all 14 1 /14 Labour Conference 2017 – in pictures Labour Conference 2017 – in pictures Britain's opposition Labour Party Leader Jeremy Corbyn delivers his keynote speech at the Labour Party Conference in Brighton Reuters/Toby Melville Labour Conference 2017 – in pictures Senior members of Britain's opposition Labour Party listen to Leader Jeremy Corbyn deliver his keynote speech at the Labour Party Conference in Brighton Reuters/Peter Nicholls Labour Conference 2017 – in pictures Diane Abbott receives a standing ovation during Jeremy Corbyn's speech at the Labour Party conference BBC Labour Conference 2017 – in pictures Labour Leader Jeremy Corbyn addresses delegates on the final day of the Labour Party conference on September 27, 2017 in Brighton Leon Neal/Getty Images Labour Conference 2017 – in pictures Labour Leader Jeremy Corbyn stands with Shadow Secretary of State for Business, Energy and Industrial Strategy Rebecca Long-Bailey (left) and Shadow Secretary of State for Education, Angela Raynor after speeches in the main hall, on day three of the annual Labour Party Conference on September 26, 2017 in Brighton Getty Labour Conference 2017 – in pictures Angela Rayner, Shadow Education Secretary, addressing the Labour Party annual conference at the Brighton Centre, Brighton PA Labour Conference 2017 – in pictures The mayor of London Sadiq Khan delivers a speech at the Labour Party Conference in Brighton, Britain Reuters Labour Conference 2017 – in pictures Dennis Skinner addressing the Labour Party annual conference at the Brighton Centre, Brighton PA Labour Conference 2017 – in pictures John McDonnell MP, Shadow Chancellor of the Exchequer Labour Party Conference, Day 2, Brighton Rex Labour Conference 2017 – in pictures Shadow Chancellor of the Exchequer John McDonnell (C) speaks with Labour party's leader Jeremy Corbyn (L) ahead of making a speech on the second day of the Labour Party Conference AFP/Getty Images Labour Conference 2017 – in pictures Labour Leader Jeremy Corbyn addresses supporters during a momentum rally on the first day of the Labour Party conference Getty Labour Conference 2017 – in pictures Jeremy Corbyn listens to speeches in the main hall on the first day of the Labour Party conference Getty Images Labour Conference 2017 – in pictures Labour Shadow Home Secretary Diane Abbott addresses delegates in the main hall on the first day of the Labour Party conference on September 24 Getty Labour Conference 2017 – in pictures Jeremy Corbyn addresses a rally ahead of the Labour Party Conference in Brighton Reuters

He continued: "Our government has a responsibility. It cannot meekly go along with this dangerous course.

"If the special relationship means anything, it must mean that we can say to Washington: that way is the wrong way. That’s clearly what’s needed in the case of Bombardier where thousands of jobs are now at stake.