I was just passing on what I read this morning, but I'm sure that there is a lot more to this incident than we shall ever now.
Just to throw this in too:
https://www.thelondoneconomic.com/opinion/why-the-cambridge-analytica-scandal-could-be-much-more-serious-than-you-think/27/03/amp/
"A source close to Skripal has said he was investigating the collusion between the Internet Research Agency, AIQ, Cambridge Analytica and its parent company, SCL."