You rightly say “Soviet scientists” instead of “Russian scientists” because various members of the former Soviet Union had access to this science, including current allies of the western empire like Ukraine. Additionally, comments from the head of the Porton Down lab indicate that the UK does in fact have novichok in its stockpile, because he said it couldn’t have come from Porton Down not because they didn’t have any, but because they have great security. Additionally, the United States was involved in dismantling the facility where these compounds were made and has been actively suppressing information about them. Additionally, an Iranian scientific paper found that it wouldn’t be difficult for any government to produce the compound at bench scale. Additionally, the recipe for the compound is publicly available on Amazon for $28.45.
All this on top of the fact that the western empire has an extensive and well-documented history of using lies, propaganda and false flags to advance power grabbing agendas, as well as the undeniable fact that said empire would stand everything to gain from such a manipulation for the reasons listed in the article that you are commenting on, combined with the fact that the UK government has been both lying about the Skripal case and trying to cover up those lies, and there is no reason whatsoever for any thinking person to take on faith that it was Russia.
Iraq was 15 years ago. Stop taking intelligence and defense agencies on faith.