Ukraine's allies will seek to "strengthen" a US plan to end the war with Russia as they meet at the G20 summit in South Africa, UK PM Sir Keir Starmer has said,
BBC reports.
The summit begins a day after President Volodymyr Zelensky warned Ukraine faced "one of the most difficult moments in our history" over pressure to accept the plan - leaked details of which have been seen as favourable to Moscow.
Zelensky held phone calls with Sir Keir and the leaders of France and Germany on Friday. Afterwards, the PM said Ukraine's "friends and partners" remained committed to securing a "lasting peace once and for all".
Neither US President Donald Trump nor Russian President Vladimir Putin are attending the G20.
The widely leaked US peace plan includes proposals that Kyiv had previously ruled out, including ceding eastern areas it currently controls.
Washington has been pressing Kyiv to accept and sent senior Pentagon officials to Ukraine earlier this week to discuss the proposals.
But there is nervousness in Europe over what has been perceived as a set of terms heavily slanted in Moscow's favour. EU foreign policy chief Kaja Kallas called the prospect of it being adopted a "very dangerous moment".