Foreign Secretary Boris Johnson has warned Theresa May that Britain’s “special relationship” with the US will not be extended under a new Brexit deal that was leaked to the Guardian.

“It is absolutely absolutely clear that if this agreement is not renegotiated, it is going to be terminated.

I have spoken to my counterparts in the US,” he said.

“Theresa May’s position has been very clear, the British government has been clear about it.

The UK cannot have a relationship that is based on trade,” Mr Johnson told reporters in London on Wednesday.

The Foreign Secretary said the UK would continue to pursue a free trade deal with the EU and would remain open to a “special deal” with other nations.

“There are two sides to every story.

And the UK cannot be the last to leave the EU, as we know from the polls,” he added.

The leaked letter was obtained by the Guardian on Tuesday.

It shows a UK government minister, Sir Malcolm Rifkind, saying that Mrs May would “never consider a special deal” for the US and warning that if she did so the UK “would not be able to accept any trade deal at all”.

The Foreign Office has said it is unable to comment on a leaked letter.

The letter said that the UK was willing to renegotiate the EU’s single market but that “there would be no special deal for us”.

“This would have to be negotiated with the Americans,” it said.

The leaked document also says Mrs May was “unwilling to accept a special relationship” as part of a post-Brexit deal. “

We are open to any possible trade deal that is in the UK’s interests, including with our European partners.”

The leaked document also says Mrs May was “unwilling to accept a special relationship” as part of a post-Brexit deal.

“I believe that any negotiations over a future trade deal will have to include a commitment to the UK remaining a free, open, and free-trading nation,” the letter said.

It also said Mrs May “did not recognise” the principle of the free movement of people within the EU.

Mrs May has previously said she will leave the bloc if a trade deal is not reached.

“If we cannot have trade in and trade out, then we are not going to negotiate the best possible deal for Britain,” she said in January.

“And I will not negotiate the right deal for my country.”

But on Wednesday, Mrs May told reporters: “We can’t let it happen.”

She said Mrs Merkel’s government was working hard to reach a deal with EU leaders in Brussels and that “we have no doubt that we will be able” to get one.