Britain, France and Ukraine have agreed to work on a ceasefire plan to present to the United States, British Prime Minister Keir Starmer said Sunday as he prepared to host a summit of European leaders to discuss ending the war.Video above: Zelenskyy, Starmer meet ahead of crisis talks with other European leadersThe summit has been overshadowed by the extraordinary scolding by U.S. President Donald Trump of Ukrainian President Volodymyr Zelenskyy at the White House on Friday for being ungrateful for U.S. support in Ukraine’s battle against the invasion by Russia.But Starmer said he’s focused on being a bridge to restore peace talks, and he used the collapse of those talks as an opportunity to reengage with Trump, Zelenskyy and French President Emmanuel Macron rather than “ramp up the rhetoric.”“We’ve now agreed that the United Kingdom, along with France and possibly one or two others, will work with Ukraine on a …