Britain has reaffirmed full support for its envoy to the US, Mr Kim Darroch, although US President Donald Trump has said he will no longer work with the ambassador.
Mr Trump last night banned Sir Kim from attending a lavish White House dinner for the Emir of Qatar shortly after posting a scathing attack of the British ambassador on Twitter.
It came after Mrs May stood by ambassador Kim Darroch for the leaked diplomatic cables that branded the United States administration as "inept".
Trump unleashed another thread of tweets berating Darroch on Tuesday morning, calling him "wacky", and a "very stupid guy".
Trump also chided the United Kingdom diplomat for being "upset" by his criticism of "how badly" Brexit was negotiated, but said if Kim was offended he should "speak to his country, and Prime Minister [Theresa May]", about the issue.
However, the timing of the discord comes as Britain is hoping to strike a major trade deal with its closest ally after it leaves the European Union, an exit scheduled for October 31.
"I told Theresa May how to do that deal, but she went her own foolish way - was unable to get it done".
Britain's trade minister Liam Fox said he would apologise to Trump's daughter Ivanka whom he was due to meet during a visit to Washington this week.
In reading out the tweets, James O'Brien said: "I wish I was joking, I think by now you know I'm not". "We will no longer deal with him".
Mr Trump has been supportive of Farage and once said he would "do a great job" as an ambassador to Washington. In a written statement, Downing Street said Darroch "continues to have the prime minister's full support", while adding: "We have made clear to the USA how unfortunate this leak is".
Kim Darroch branded the United States as "inept".
While British officials hunted for the culprit behind the leak, senior Conservative Party figure and former Foreign Secretary William Hague said the government was right to back Darroch. "It is their job to give an honest assessment of what is happening in that country", Hague told BBC radio.
Online Sports Betting Market Growth
Benefits With the market high, sports betting is an activity that receives a high level of support from online betting companies. More betters are opting to forego the long lines at the cashier's counter and the unavailability of their favorite machines.