It comes as some companies have already paused exports into Europe, including Ireland, due to Brexit red tape.

Brexit: Businesses set to face 'significant disruption' at UK border

The government predicts a deal could boost US-UK trade by £15.3 billion.

UK publishes negotiating objectives for post-Brexit US trade deal

Donald Trump's National Security Advisor tweeted after meeting Boris Johnson, saying the pair had discussed the UK-US relationship.

The digital services tax is expected to be passed by the French Senate on Thursday.

The leaders will discuss import tariffs as they try avert an all out EU-US trade war - something that has been brewing a while.

The prime minister said the US president's decision to apply tariffs to EU steel and aluminium imports was "unjustified."

It came with the US considering duties on an additional 100 billion dollars in goods imported from China.

Cohn's departure comes amid a period of unparalleled tumult Trump's administration and aides worry that more staffers may soon leave.

The EU is mulling a 25% tariffs on around $3.5bn of imports from the US, including iconic American brands.

Anthony Scaramucci told ITV News that a trade agreement with Britain was a priority for the incoming president.