Keir Starmer welcomed Volodymyr Zelensky and other European leaders in London on Monday as Kyiv’s European allies try to strengthen Ukraine’s hand in thorny talks on a US-backed plan to end the Russia-Ukraine war. Zelensky said late Sunday that his talks with European leaders this week in London and Brussels will focus on security, air defense and long-term funding for Ukraine’s war effort. The leaders are working to ensure that any ceasefire is backed by solid security guarantees both from