Saw this report today, and just had to say something about it:
https://johnhelmer.net/new-book-published-today-long-live-novichok/
In particular, these two statements attributed to Putin deserve scrutiny:
"Regarding the tragedy you have mentioned,” Putin told reporters, “I learned about it from the media. The first thing that comes to mind is that, had it been a warfare agent, the victims would have died immediately. It is an obvious fact which must be taken into account. This is first."
That is totally correct. Novichok is nasty stuff, a tiny amount of which is sufficient to kill any human.
"The second is that Russia does not have such chemical agents. We destroyed all our chemical weapons, and international observers monitored the destruction process."
This statement is misleading. One of the major goals of the Foliant Program which produced Novichok was to be able to make it from readily available precursor chemicals which are NOT considered to be chemical warfare agents. So Putin could truthfully say "we don't have any", but it would be easy for anyone to make some whenever and wherever they wanted. Here is some background info which supports these claims:
https://www.cnn.com/2018/03/13/world/novichok-former-soviet-chemist/index.html
I believe the entire Skripal episode was a "false flag attack" intended to make the Russians look bad on the international stage. I have no idea whether the Skripals were participants or victims (or were even exposed to ANY chemical agent), but the facts presented in the above reports suggest they probably were innocent victims selected because of who they were.
Anyway, that's my two cents.
FYI, you can find my earliest writings about Novichok here:
https://sainthoward.blogspot.com/2013/05/were-chemical-weapons-used-during-first.html