European leaders called for a unified response to Donald Trump's policies following the summit in Malta.
Theresa May arrived for the meetings in the capital Valletta today, where she's told fellow leaders about her visit to Washington DC and urged Europe to increase its spending on defence and fulfill its Nato contributions.
The summit provided an opportunity to foster relationships ahead of the upcoming withdrawal negotiations, where the Prime Minister met German Chancellor Angela Merkel, Austria's Christian Kern, and Spain's Mariano Rajoy among others.
However it's reported she's also been dealing with concerns over the President's perceived hostility to the European Union and the executive order banning travel to the United States from seven predominantly Muslim countries.
Meanwhile, France's President Francois Hollande highlighted the necessity of a united European position in dealing with the American president.
He said: "Those who want to forge bilateral ties with the US are of course well understood by the public.
"But they have to understand there's no future with Trump if it's not a common position. What matters is EU solidarity."
Mr. Kern said: "Today we have mixed feelings, because the tangible aspects of Trump's policies are raising some concerns.
"It [Trump's presidency] could be a catalyst for a strong, more united Europe. It is a call to see if we are on the right track."