May issues ultimatum to Moscow over Salisbury poisoning

May issues ultimatum to Moscow over Salisbury poisoning  The Guardian Spy poisoning: How could the UK retaliate against Russia?  BBC News UK's May says 'highly likely' Russia behind nerve attack on spy  Reuters 'Highly likely' Russia poisoned former spy, UK's Prime Minister says  CNN Newspaper headlines: May's Russia ultimatum and 'eggstortion'  BBC NewsFull coverage