European leaders convened in London on Sunday for a crucial summit to forge a unified approach to the Ukraine conflict, following a dramatic rupture in U.S.-Ukraine relations during President Volodymyr Zelenskyy's White House visit.

British Prime Minister Keir Starmer announced that Britain, France, and Ukraine have agreed to work on a ceasefire plan to present to the United States [1]. The initiative emerged from discussions between the leaders following Friday's contentious Oval Office meeting between Zelenskyy and U.S. President Donald Trump.

"We have now agreed that the United Kingdom along with France and possibly one or two others will work with Ukraine on a plan to stop the fighting and then we will discuss that plan with the United States," Starmer told the BBC [6].

The summit at Lancaster House near Buckingham Palace brought together leaders from 18 countries, including France, Germany, Italy, and Poland, along with NATO and EU representatives [1]. Britain also announced a £2.26 billion loan agreement to enhance Ukraine's defense capabilities [3].

European Commission President Ursula von der Leyen emphasized the need for increased European defense capabilities, stating, "The path to peace is strength. Weakness breeds more war" [1].

French President Emmanuel Macron warned that Russia poses an existential threat to Europe, saying Putin could "move on to Moldova and perhaps beyond to Romania" if not stopped [1].

Meanwhile, the Kremlin appeared to welcome recent developments, with spokesman Dmitry Peskov noting that U.S. foreign policy now "largely coincides with our vision" [1]. This follows the U.S. joining Russia in voting against a Europe-backed Ukrainian resolution at the UN General Assembly last week.

Poland's Prime Minister Donald Tusk emphasized European military capability, noting that Europe has 2.6 million professional soldiers - more than the U.S., China, or Russia [1].