The breakdown in U.S.-Ukraine ties has given new urgency to the two European nuclear powers' efforts to pull together ideas for a peace plan that would initially outline a short truce but also eventually include broader security guarantees. Britain and France have both said the U.S. would be needed for future assurances.

British Prime Minister Keir Starmer announced that Britain and France will work with Ukraine on a peace plan and it will be presented by the U.S.The Guardian