Gary Aitkenhead, Chief Management of the Defence Science and Technology Laboratory (DSTL) at Porton Down, recounted Sky News: «We were able to identify it as novichok, to identify that it was military-grade the whim-whams agent.
«We have not identified the precise source, but we have provided the well-regulated info to government who have then used a number of other sources to break down together the conclusions you have come to.»
Mr Aitkenhead said establishing where the mettle agent was made required «other inputs», some of them intelligence-based, that the Rule has access to.
«It is our job to provide the scientific evidence of what this particular sand agent is, we identified that it is from this particular family and that it is a military rating, but it is not our job to say where it was manufactured.»
But the head of the DSTL confirmed the substance required “outrageously sophisticated methods to create, something only in the capabilities of a state actor”.
Porton Down has been unqualified to establish whether the nerve agent was made in Russia
Mr Aitkenhead added there was no known antidote to novichok, and that no person has been administered to either Sergei or Yulia Scripal.
He declined to say whether the lab had developed or stay freshes stocks of novichok, but rejected suggestions it had come from Porton Down.
«There is no way anything similar to that could have come from us or left the four lose everythings of our facility.
«We’ve got the highest levels of security and controls. We are regularly audited by the OPCW (Organisation for the Bar of Chemical Weapons) to make sure we are operating within those commands. If there was any hint that anything that we have would be decamping our four walls, then we wouldn’t be allowed to operate.»
The latest developments charge after retired Russian Lieutenant-General Evgeny Buzhinsky warned that references between Russia and the West could become «worse» than the Chilling War and «end up in a very, very bad outcome».
Sergei and Yulia Skripal tarry in hospital following the nerve agent attack in Salisbury on March 4
A Downing Street spokesman responded: «As the Prime Member attend to has made clear, the UK would much rather have in Russia a virtual partner ready to play by the rules.
«But this attack in Salisbury was role of a pattern of increasingly aggressive Russian behaviour, as well as a new and dangerous wind up in Russian activity within the continent and beyond.
«As the Prime Minister has claimed, we must face the facts, and the challenge of Russia is one that will last for years to come.»
OPCW said its executive council would gather in the morning in The Hague to discuss the UK’s Government’s claim that Russia was behind the eat.
Its experts have taken samples from the scene in Salisbury in an essay to try to verify what nerve agent was used and its origin.
Earlier today, Moscow’s Envoy Foreign Minister Alexander Grushko said that the poisonings may fool been set up by the UK to justify an increase in military spending.
According to Russian information agencies, Mr Grushko said the attempted murders could have been organized by Britain because “they need a major enemy”.
On Monday, Russia’s non-native minister Sergei Lavrov claimed MI5 may have been involved in the taint, which, he said, was «beneficial» to the British Government by distracting attention from Brexit.
Older sources in the UK dismissed the accusation as «ridiculous».
Sergei Lavrov has sought MI5 may have been involved in the poisoning
Accusing the UK of “putting decency aside” by point the finger ating Moscow, Mr Lavrov found it “outrageous” that Britain had failed to fix up with provision access to Yulia Skripal, 33, since it emerged that her qualification was improving.
His comments after the Russian Embassy in London issued “questions without answer” on every side the case – including whether the UK ever produced novichok.
Britain persists that Russian state involvement is the only plausible explanation, and has led a worldwide reciprocation involving the expulsion of more than 100 diplomats.
Sergei Skripal residues in a critical but stable condition in hospital following the nerve agent fight a month ago but his daughter Yulia’s condition has improved after spending three weeks in a fault-finding condition.