President Donald Trump has said a US plan to end the Russia-Ukraine war is not his “final offer” for Kyiv, after Ukrainian allies voiced concerns over proposals.Earlier on Saturday, leaders from Europe, Canada and Japan said the plan had elements “essential for a just and lasting peace”, but would “require additional work”, citing concerns over border changes and caps on Ukraine’s army. On Sunday, security officials from Britain, France, Germany, the US and Ukraine will meet in Geneva, Switzerland.President Volodymyr Zelensky earlier warned Ukraine faced “one of the most difficult moments in our history” over US pressure to accept the plan seen as favourable to Moscow.Trump has given Ukraine until 27 November to accept the 28-point plan, while Russia’s President Vladimir Putin said it could be the “basis” for a settlement.When asked on Saturday whether the current draft plan was his final offer for Ukraine, Trump told reporters at the White House: “No, not my final offer.” “One way or another we have to get it [the war] ended, so we’re working on it,” he added.US Secretary of State Marco Rubio and special envoy Steve Witkoff will be among those taking part in talks in Geneva on Sunday. National Security Adviser Jonathan Powell will attend on the UK’s behalf.Saturday’s joint statement at the G20 summit in South Africa was signed by the leaders of Canada, Finland, France, Ireland, Italy, Japan, the Netherlands, Spain, the UK, Germany and Norway. Two top EU officials were also among the signatories.The statement said: “We believe therefore that the draft is a basis which will require additional work. We are ready to engage in order to ensure that a future peace is sustainable. We are clear on the principle that borders must not be changed by force.”We are also concerned by the proposed limitations on Ukraine’s armed forces, which would leave Ukraine vulnerable to future …