An RMT spokesperson insisted that Mr Dempsey has ‘at no time supported Russia's invasion of Ukraine’ Sign up for the View from Westminster email for expert analysis straight to your inbox Get our free View from Westminster email Get our free View from Westminster email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice The leader of a major railway union posed with a Communist flag and was pictured alongside people singing