Ukraine
I don't know about that, the lab tests which find poisons in blood are of the kind which take some time for the results to come back from the lab.
I'm not sure there have been enough days for Assad's blood test to have come back from the lab, much less have had the time to have have poisoned him and .... .
Maybe the British Sun makes up their stories over strong coffee mixed with mescaline and kerosene, served in their writers lounge during mornings.
Maybe they switch to distilled booze during afternoons.
Heroin on weekends.