Theresa May has said Britain and the US will continue to be strong partners as she congratulated Donald Trump on his victory in the US Presidential election.
The prime minister said she would look forward to working with the President-elect to "ensure the security and prosperity of our nations" in the future.
Later this afternoon a spokesperson added that she had personally written to Trump. They said:
The PM wrote to President-elect Donald Trump today to congratulate him on his victory in last night's election.
Her letter reaffirmed the strong ties that exist between Britain and the United States, which are based on the values of freedom, democracy and enterprise, and she spoke of our close partnership on trade, security and defence.
The PM wrote that she looks forward to speaking to Mr Trump and to working with him to build on the enduring and special relationship between our two countries, to ensure our shared security and prosperity in the years ahead.
Just a few months ago May said that the Republican was "just plain wrong" when he said that there were parts of Britain that were so radicalised that police were afraid for their own lives.
Don't forget, it was earlier this year that British politicians debated whether they should ban Trump from visiting Britain after a petition gathered over half a million signatures.
The reaction to Trump's win from UK politicians was generally mixed, with many tweeting their concerns about what his presidency would mean.
The full statement from May said:
I would like to congratulate Donald Trump on being elected the next President of the United States, following a hard-fought campaign.
Britain and the United States have an enduring and special relationship based on the values of freedom, democracy and enterprise.
We are, and will remain, strong and close partners on trade, security and defence.
I look forward to working with President-elect Donald Trump, building on these ties to ensure the security and prosperity of our nations in the years ahead.
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