Moscow on Thursday said it would not accept the conclusions of the global chemical arms watchdog, unless Russian experts are given access to the samples used.
The organization rejected a Russian call for a joint investigation into the incident during a closed session in The Hague last week to discuss the first offensive use of a chemical weapon in Europe since World War II. Speaking on Friday during a news conference in London, he said the United Kingdom government should have sent the allegations directly to Russian Federation.
Skripal moved to Britain in a spy swap in 2010 and settled in Salisbury, and his daughter Yulia was visiting from Russian Federation when they were poisoned, possibly on his front door.
On Thursday (Friday NZT), the independent chemical weapons watchdog, the Organisation for the Prohibition of Chemical Weapons, independently confirmed the UK's analysis that a high-purity dose of a toxic chemical known as Novichok had been used to poison the Skripals.
According to the embassy's maycommentary, "the case against Russian Federation is based on three elements: the identification of the chemical agent, far-fetched speculations and conclusions regarding the "operational experience" and "motive", as well as unverifiable 'intelligence'".
"If someone was spying, why were the British services not complaining about that?"
Johnson said the chemical "was a military grade nerve agent - a Novichok", a group of deadly chemical compounds reportedly developed by the Soviet government in the 1970s and 1980s. The name and structure of the identified toxic chemical are contained in the full classified report'. "Within the last decade, Russian Federation has produced and stockpiled small quantities of Novichoks under the same programme".
In the 2000s, Sedwill said Russian Federation had trained military personnel in using these weapons, including on door handles, and Russian Federation "has a proven record of conducting state-sponsored assassination". The embassy posted on Twitter on Tuesday: "We need urgent proof that what is being done to her is done on her own free will".
He went on: "We didn't produce and store Novichok, so this is the fact of life and all these allegations that we produce something have nothing to do with the reality". "In the mid-2000s, President Putin was closely involved in the Russian chemical weapons programme".
In response to the claims, he said: "The British Government still hasn't produced any evidence in support of its position that would confirm their official version". His daughter thanked the Salisbury hospital staff, adding: "I have left my father in their care, and he is still seriously ill". Yulia has been discharged and is reportedly being kept at an MI5 "safe house".
Ms Skripal has been released from hospital but her father is still being treated.