2 Poisonings, a Killing and a Diplomatic Crisis: The Novichok Case. Great Britain, Poisoning and Poisons, Assassinations and Attempted Assassinations, Politics and Government, Hazardous and Toxic Substances, Espionage and Intelligence Services, Diplomatic Service, Embassies and Consulates, Skripal, Sergei V, Skripal, Yulia S, Russia