Ex-Russian spy poisoned with nerve agent UK counter-terrorism officers are working to uncover the origin of the nerve agent used in the attempted murder of ex-Russian spy Sergei Skripal and his daughter, Yulia, in Salisbury Left: Former Russian army officer Sergei Skripal, given refuge in UK after 2010 spy swap with Moscow. Inset: Moscow-based Yulia Skripal is believed to have been visiting her father TIMELINE OF POISONING Mar 4, 2018, 1.30pm: Skripal, 66, and his 33-year-old daughter Yulia seen near Maltings shopping centre in Salisbury. Pair reportedly eat at Zizzi restaurant in Castle Street 3.47pm: CCTV footage possibly shows pair in covered walkway connecting branch of Zizzi with park where they are later found 4.15pm: Member of public calls police after seeing pair collapsed on bench. Zizzi and nearby Bishop’s Mill pub later cordoned off Mar 5: Pair critically ill in Salisbury hospital from exposure to unknown substance. Police officer who went to their aid also hospitalised. Wiltshire police declare “major incident” Mar 6: Counter-terrorism police take over investigation. Ambulance base at Solstice Park business centre briefly cordoned off Mar 7: Police say substance used in poisoning is nerve agent, “likely to be rarer than Sarin or VX” Pair found unconscious CCTV footage Bishop’s Mill pub Possible route Zizzi restaurant 50m 165ft Police cordons 3km 2 miles Christie Miller Road Skripal’s home SALISBURY Salisbury District Hospital Porton Down Substance being tested at military research facility Boscombe Down Amesbury Solstice Park Sources: BBC, Business Insider Pictures: AP, Google Maps © GRAPHIC NEWS