Sir Kim Darroch, the UK ambassador to the US who was forced to announce his resignation after describing President Donald Trump as "inept," has been made a Lord.

Darroch was given a lifetime seat in the House of Lords by former UK Prime Minister Theresa May.

Darroch announced in July that he would resign, after the publication of diplomatic cables in which he spoke harshly of the Trump administration, enraging the president.

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Sir Kim Darroch, the UK ambassador to the US who was forced to announce his resignation after calling President Donald Trump "incompetent," has been made a Lord by former Prime Minister Theresa May.

May on Tuesday released her resignation honors list, a tradition in British politics where an outgoing prime minister grants honors such as knighthoods and peerages (which grant the title of Lord) to people of their choosing.

The list included Darroch, who will be given a life peerage, granting him permanent membership in the UK House of Lords and the title of Lord.

Darroch became Britain's ambassador to the US in 2016, under President Barack Obama. He continued to serve after Trump's election but announced his resignation in July after a leak of his internal guidance to the British government provoked the president's fury.

In diplomatic cables leaked to The Mail on Sunday, Darroch described the Trump administration as "inept" and "incompetent."

Read more: Kim Darroch resigns as UK ambassador to the US over leaked memos branding Trump 'incompetent'

Darroch called the Trump White House "uniquely dysfunctional," spoke of "knife fights" among officials and constant scandals that could "crash and burn" the presidency, and said that Trump was indebted to "dodgy Russians" and that he feared Trump would attack Iran, The Mail on Sunday reported.

"We don't really believe this Administration is going to become substantially more normal; less dysfunctional; less unpredictable; less faction riven; less diplomatically clumsy and inept," Darroch wrote in one particularly damning cable, according to The Mail on Sunday.

Darroch at the British Embassy in Washington, DC, in October 2017. Sait Serkan Gurbuz/AP

Read more: British police are probing the leak of an ambassador's memos that called Trump inept: 'Turn yourself in'

The leaked cables prompted the wrath of Trump, who wrote in two tweets that he would "no longer deal with" Darroch, which would effectively ruin Darroch's ability to act as a diplomat in Washington.

"I do not know the Ambassador, but he is not liked or well thought of within the U.S.," Trump said. "We will no longer deal with him."

As the furor intensified, Darroch announced that he would step down, though he did not give a date of departure; he remains in his post while the UK government searches for a replacement. He had already been scheduled to leave the post at the end of 2019.

After Darroch announced his resignation — and compared Trump to Arnold Schwarzenegger in "The Terminator" — Trump appeared to change his mind about Darroch, saying he wished the ambassador well.