FILE - In this Thursday, Oct. 19, 2017 file photo, Britain's Labour Party leader Jeremy Corbyn delivers a speech prior to a meeting of European Socialists prior to an EU summit in Brussels. The United States and other allies have united behind the U.K. government in blaming Russia for the nerve-agent poisoning of former spy Sergei Skripal and his daughter Yulia. But Britain's main opposition party is split over how firmly to point the finger at Moscow. (AP Photo/Geert Vanden Wijngaert, file)