[Paladin2]

How do they know it wasn’t the CIA looking to pin some more stuff on The Rooskies?

[Rashputin]

A few miles from the heart of British chemical/biological weapons research and production it seems more likely that it was the Brits trying to take the focus off of their helping plan and execute the attempted coup against Trump.

The second poisoning happening near by with the surviving victim having told Scotland Yard that he found the poison in a sealed bottle also makes it look like it wasn't anyone who had to transport the poison very far prior to using it as opposed to just picking it up a few miles down the road at the Porton Down drive in window.

Once the US went along with the British cock and bull story, though, everyone and his brother has been trying to take advantage of the incident.