BBC: Russian spy poisoning – Watchdog backtracks over Novichok amount

Britain's Prime Minister Theresa May (C) talks with Wiltshire Police's Chief Constable Kier Pritchard (L) in Salisbury, southern England, on March 15, 2018, as she is shown the area where former Russian double agent Sergei Skripal and his daughter Yulia were discovered on March 4, following an apparent nerve agent attack. Britain expelled 23 Russian diplomats over the nerve agent poisoning of a former spy, and suspended high-level contacts, including for the World Cup, as the US joined it in blasting Moscow at the UN on March 14. British Prime Minister Theresa May told Britain's parliament that Russia had failed to respond to her demand for an explanation on how a Soviet-designed chemical, Novichok, was used in the English city of Salisbury on March 4.