For the record, I also think that the nerve agent attack could have been made by a non-Russian country. There is a lot we are not being told !
It's possible but highly unlikely given the nerve agent used and who was targeted. The main victim was a spy for the UK against Russia in the past and was actually captured and imprisoned in Russia (allegedly), however was later returned to the UK as part of some sort of exchange deal many, many years ago (allegedly). One real issue I have with all of the news regardless of who was responsible was the fact that the targets daughter was innocent entirely (was not even a spy) and was killed which is quite disgusting if you ask me.
The nerve agent was a Russian creation and would have been closely locked down, so not anyone would have just been able to steal it from their military and use it. Not to mention that it was not something you cannot just randomly create, it would have to extremely precise in measurements of chemicals and the formula would have taken a long time to be developed by Russia in the first place. You would need a lot of resources, both in testing, science, space for working and access to a variety of chemicals used in the process of the development to be able to do it... and time would be a huge factor. Money would also be another huge factor.
If it was someone / another government / a criminal group trying to frame Russia, there would have been much easier ways to go about it. Especially given how the reputation Russia has after the recent news about NotPetya was already falling.
These are just my personal opinions though.
However, my point is about Kaspersky. If the UK were to launch a cyber attack on Russia, the Russian government would surely respond. Would they possibly be able to exert pressure on Kaspersky to help them with this ?
The answer is Yes since Kaspersky is registered and resides within Russia. If it came down to it, Kaspersky would be forced to do whatever the Russian government wanted to do. However, Kaspersky could theoretically just refuse. I don't know what those consequences would bring though. Probably imprisonment or worse.
That being said, the US government dropped usage of Kaspersky entirely and the UK followed in those steps by not recommending Kaspersky anymore and UK banks stopped offering it for free service as part of the package of using their services.
Unless you're a government agent, your intelligence will likely be completely useless to a government agency with trying to fight against the government of where you're situated. All you will have as a normal home user is typical, average home user content... it'd be useless to them.