Poisoning of Sergei and Yulia Skripal Investigators discover the Skripals switched off their mobile phones for four hours shortly before falling ill, and begin examining mobile phone data from everyone in Salisbury the day of the crime in a bid to link a phone to the poisoner. Sergei Skripal's phone was 'switched off for 4 hours' on day he was poisoned © Daily Mirror Sources: Daily Mirror
