Trade secretary Jonathan Reynolds is meeting US officials on Tuesday as the UK faces a race against time to prevent Donald Trump bringing in new tariffs on steel.
Earlier this month, a UK-US trade deal was unveiled that should have exempted Britain from steel tariffs; however, the move has yet to be implemented, and the details are still being worked out ahead of a formal deal.
On Tuesday in Paris, Mr Reynolds and US trade representative Jamieson Greer are expected to discuss implementing the agreement.
It comes amid uncertainty about the future of Mr Trump’s tariffs after a US court last week ruled many of them unlawful, before an appeals court reinstated the levies pending a further hearing.
Last week also saw Mr Trump announce that he would double tariffs on steel to 50 per cent, starting on Wednesday, and it remains unclear how the UK would be affected by his declaration.
Mr Reynolds’ visit to Paris is part of a three-day trip, during which he is expected to meet other trade ministers and attend a G7 ministerial meeting before heading to Brussels for meetings with his EU counterparts.

During the trip, the trade secretary will argue that the UK is a dependable partner in an era of increasing global volatility.
He said: “Our deals with the US, EU and India are proof that the UK is the most connected country in the world to do business. Along with our modern industrial strategy, our Plan for Change is making the UK a safe, stable bet in uncertain times.
“We recognise our relationship with G7 allies and EU counterparts must continue to evolve and deliver a better trading environment for our businesses and exporters.
“That’s why we want to wipe away costly, business-blocking barriers and open up opportunities to grow our economy, create jobs and put more money in people’s pockets.”
Andrew Griffith, Conservative shadow business secretary, said: “Labour told the British public we had a deal with the US – but one month on, there is no deal in sight, meaning British businesses and workers continue to suffer because of Labour’s failed negotiations.
“After snatching the winter fuel payment, lying about not increasing taxes, and misleading the public by saying the US trade deal was done, the public will rightly not trust a word Labour says.
“As all the other political parties wrangle over how to spend more taxpayers’ money, only the Conservatives are committed to being responsible with the public finances.”